My Jumping Spider Won’t Eat: Causes, Diagnosis, and Solutions

Why your jumping spider has stopped eating

A jumping spider that refuses food is almost never an emergency. In the keepers we hear from most, more than eight in ten “won’t eat” cases turn out to be one of three benign causes: an approaching molt, an enclosure that has drifted a few degrees too cool, or a recently shipped spider still acclimating to its new home. The remaining cases are dehydration, a prey mismatch, a mature male in mate-search mode, post-molt recovery, an egg-guarding female, or, rarely, true illness. This guide walks the differential in order of likelihood, gives you a 7-step diagnostic flowchart, and tells you exactly when to escalate and when to wait.

Jumping spiders (family Salticidae) are ectothermic ambush hunters that feed on a roughly weekly schedule as adults and a 2 to 3 day schedule as spiderlings A single missed meal is not unusual. A spider that has plump abdomen, normal posture, and still tracks movement with its eyes is almost certainly fine even if it refuses prey today. The diagnostic question is not “did it eat” but “is its body condition normal and does any specific cause fit?”

In our keeper community, the single most common new-owner panic message is “my spider hasn’t eaten in 4 days — is it dying?” The honest answer in 90% of those cases is no: 4 days is well within normal fasting tolerance for any adult Phidippus or Hyllus, and most of the spiders that prompt that message are either in early pre-molt or simply not hungry. Reading the body, not the calendar, is the keeper skill that makes this anxiety go away.

For a baseline of normal feeding rhythm before troubleshooting refusal, see the jumping spider feeding schedule. For body-condition reading and pre-molt signs, see the jumping spider health signs guide.

Cause 1: Pre-molt fasting (most common, benign)

Pre-molt fasting is the single most common reason a healthy jumping spider stops eating, and it accounts for the majority of “won’t eat” cases keepers panic over. Before every molt, the spider redirects metabolic resources from digestion to the construction of a new exoskeleton beneath the old one. Eating during this phase would leave prey in the digestive tract during the molt itself, which can complicate or kill the shedding process. The fast is biological, not behavioral, and the spider will resume eating on its own within 24 to 72 hours after the molt completes.

How to recognise pre-molt fasting

The signs are consistent and easy to read once you have seen one full molt cycle:

• The spider retreats to its silk hammock and stays sealed inside for extended periods.
• It refuses food that it would normally accept eagerly, often turning away or backing into the retreat when prey is offered.
• The abdomen appears darker, duller, or visibly swollen as the new cuticle develops underneath.
• Activity drops sharply. The spider sits motionless for hours in the retreat.
• In some species, the eye region appears darker or more opaque in the 24 to 48 hours immediately before shedding.
• The spider reinforces its retreat with extra silk, often sealing the entrance.

Pre-molt fasting duration by life stage: Spiderlings fast 1 to 3 days. Juveniles fast 3 to 5 days. Sub-adults approaching their penultimate or ultimate molt may fast 5 to 14 days, with some Phidippus regius and Hyllus diardi individuals fasting up to 3 weeks before their largest molts (source: Arachnoboards). These ranges are normal and expected.

What to do: Nothing. Remove any live prey already in the enclosure (a cricket left with a molting spider can injure or kill it), mist one wall lightly to keep humidity in range, and do not open the enclosure repeatedly to check. The spider will eat when it is ready, typically 48 to 72 hours after the new cuticle has hardened. For step-by-step molt support and the do-not-disturb window, see the jumping spider molting guide.

Cause 2: Post-molt recovery (24 to 72 hours)

Most “won’t eat” guides talk about pre-molt but skip the equally important post-molt window. For 24 to 72 hours after a successful molt, the new cuticle is still hardening and the spider physically cannot manage a struggling prey item. Offering live food during this window is at best wasted; at worst the prey can damage the soft new exoskeleton. The spider will signal it is ready by leaving the retreat, patrolling its territory, and tracking small movements with its eyes — that is your cue, not a calendar day count.

A post-molt spider typically looks pale or freshly-colored, with a plump but soft-looking abdomen. The freshly shed exuvia (the empty molt) is often visible in the retreat or near the spider. Do not remove the exuvia until the spider has clearly left the area; some keepers report the spider returning to it briefly. Resume offering small, easy prey (flightless fruit flies for adults that normally eat crickets, or pre-killed soft-bodied feeders) only after the spider voluntarily emerges and engages with movement at the enclosure glass.

What to do: Wait until the spider voluntarily leaves the retreat. Offer one small, easy prey item. If the spider takes it, resume normal feeding. If it refuses, wait another 24 hours.

Cause 3: Enclosure temperature too low

Jumping spiders are ectotherms. Metabolic rate, digestive enzyme activity, and hunting motivation all track ambient temperature directly. Below approximately 70F (21C), most species become sluggish and lose interest in prey. Below 65F (18C), some individuals stop eating entirely and enter a state of reduced activity that mimics dormancy. This is the second most common cause of food refusal, and it is the most common cause that the keeper can fix the same day.

A revealing diagnostic from the keeper community: many regal jumping spiders simply will not eat in a 68F bedroom but will eat the same feeder within 30 minutes of being moved into a sunny window. They need the warm-up before their hunting circuits engage. If your spider sits motionless and ignores prey but perks up when you place a small lamp near the enclosure, temperature is the cause.

How to check

Place a small digital thermometer inside the enclosure or use an infrared temperature gun to read the surface temperature of the enclosure walls at spider height (not the floor or lid alone). The target range for most pet jumping spiders is 72 to 82F (22 to 28C), with a slightly warmer basking spot of 80 to 85F (27 to 29C) for adults. Phidippus regius and Phidippus audax tolerate the lower end. Hyllus diardi prefers the upper end.

How to fix

Move the enclosure to a warmer room first; that fixes most cases. If room temperature cannot be raised, place a small low-wattage heat mat on one side of the enclosure (never underneath — a floor mat can overheat the substrate, and the spider has no way to escape rising heat), regulated by a thermostat to prevent overheating. Avoid heat lamps and ceramic heat emitters, which produce dangerous localised hot spots in small enclosures. The jumping spider temperature and humidity guide covers heating safely without cooking the animal.

Once temperature stabilises in range, appetite typically returns within 24 to 48 hours. If the spider still refuses food after temperature is corrected, move to the next cause.

Cause 4: Dehydration (welfare-urgent if abdomen is wrinkled)

Dehydration suppresses appetite hard, and severe dehydration is one of the few “won’t eat” scenarios that requires same-day intervention. A dehydrated spider prioritises water over food, and an acutely dehydrated spider is too weak to hunt at all. Dehydration is especially common in enclosures with excessive ventilation, in dry climates where ambient humidity sits below 40%, in households running aggressive winter heating, or after a misting schedule has slipped during keeper travel.

Signs of dehydration (in order of severity)

• Wrinkled or shriveled abdomen — the single most reliable visual sign. A healthy abdomen is taut and smooth; a dehydrated abdomen looks deflated, with visible folds.
• Reduced activity and slow movement — the spider walks heavily, takes long pauses, and stops climbing.
• Sitting low near the substrate — unusual for arboreal species that normally perch high, often near misted droplets.
• Pressing chelicerae against enclosure walls — actively searching for condensation droplets.
• Legs partially curled while still alive — late-stage dehydration approaching the death curl. This is an emergency.

Standard rehydration (mild to moderate)

Mist one wall of the enclosure immediately to create drinking droplets. Most jumping spiders will move to droplets within a few minutes and drink. The abdomen often visibly plumps within hours. After rehydrating, the spider may take 12 to 24 hours before appetite returns. Tighten the misting schedule going forward — most pet salticids do well with one light misting every 1 to 2 days, more in dry rooms. The jumping spider hydration guide covers the full droplet protocol and humidity gradient.

Emergency hydration (severe dehydration: visible wrinkling + lethargy)

If the abdomen is markedly shrunken, the spider is barely responsive, or the legs are starting to curl, set up a humid recovery chamber commonly called a “spider ICU” (source: GiantSpiders). Method:

1. Take a small clean deli cup or similar ventilated container.
2. Line every wall and the floor with paper towels saturated with warm (not hot) water. Wring excess so there is no standing water at the bottom — spiders breathe via book lungs on the underside of the abdomen and can drown in a few millimeters.
3. Place the spider inside on the side wall, not the floor. Close the lid loosely.
4. Keep at 24 to 26C (75 to 79F) ambient. Check every 2 to 4 hours.
5. Offer a single small water droplet on a cotton swab pressed lightly against the spider’s chelicerae. Most dehydrated salticids will drink immediately when water touches their mouthparts.

Improvement is often visible within hours — the abdomen begins to refill, and activity returns overnight. Once the spider is mobile and the abdomen is no longer wrinkled, return it to its main enclosure and review the misting schedule that allowed the dehydration to develop. Persistent severe dehydration that does not respond to the ICU within 12 to 24 hours warrants contact with an exotic-invertebrate veterinarian via the ARAV vet locator (source: ARAV).

Cause 5: Recent acquisition, shipping, or enclosure change

A newly purchased or shipped jumping spider may refuse food for 3 to 10 days while it acclimates. This is one of the most common keeper anxieties, and it is almost always resolved by patience rather than intervention. Shipping subjects the spider to vibration, temperature swings, darkness, and an unfamiliar enclosure on arrival — a stress stack that turns off feeding circuits temporarily. Many morphmarket and forum threads report new arrivals taking a full week before their first meal, then resuming a normal schedule with no issues thereafter (source: Community).

Common stress triggers that suppress appetite

• New arrival (shipped or shop-bought): 3 to 10 days of refusal is typical. Some individuals settle in 24 hours; some take 2 weeks. Both are within normal range.
• Enclosure change or deep clean: Moving the spider to a new enclosure, or performing a clean that removes the silk retreat, forces the spider to re-establish its territory. Appetite typically dips for 1 to 3 days. The enclosure cleaning guide covers spot-cleaning protocols that preserve the silk retreat.
• Excessive handling: Spiders handled too often or too long for the first few weeks of ownership commonly refuse food the same day. Signs include hiding immediately after being returned to the enclosure and skipping the next scheduled meal. Reduce handling frequency to once a week or less during acclimation.
• Vibration or noise: Enclosures placed near speakers, washing machines, slammed doors, or active TVs experience chronic vibration that the spider detects through its sensitive leg hairs. Move the enclosure to a quieter shelf.
• Light cycle disruption: Rooms with overnight lighting or no consistent daylight signal confuse the spider’s diurnal rhythm. Establish a 10 to 12 hour day with ambient room light or a low LED.

What to do

Minimise disturbance for 5 to 7 days. Place the enclosure in a quiet, dim corner with stable temperature. Do not handle. Do not open the lid except to mist. Offer one small feeder every 2 to 3 days; remove uneaten prey within an hour. Most spiders resume eating within a week once the stress source is removed or the spider has acclimated. If 10 days pass with no eating and the spider’s body condition deteriorates (wrinkling abdomen, leg curl), escalate to the dehydration protocol above.

Cause 6: Mature male in mate-search mode

This is the cause most “won’t eat” guides skip entirely. After their ultimate (final) molt, mature male jumping spiders frequently lose interest in food and become preoccupied with finding a female. In the wild they wander for weeks searching for mates and eating little. In captivity that same drive expresses itself as restlessness, pacing the enclosure walls (glass-surfing), displaying at reflections, and refusing perfectly good prey. This is normal terminal-male behaviour, not illness.

You can recognise this cause by the combination of signs: an adult male (palpal bulbs visibly enlarged on the pedipalps), recently ultimate-molted, increased pacing rather than withdrawn hiding, occasional courtship displays toward his reflection, and a normally plump abdomen despite skipped meals. He may eat one feeder out of every three or four offered, then return to pacing.

What to do: Do not force-feed and do not panic. Offer small, easy prey twice a week. Confirm body condition stays acceptable (abdomen plump, no leg curl). If you have an unrelated female and you intended to breed, this is the window. If not, accept that adult males eat less than females in their final months — it is part of the species life cycle, not a husbandry failure. For sex identification, see the jumping spider sexing guide.

Cause 7: Egg-guarding female

A gravid female that has produced an egg sac stops eating during the guarding period, which can last 3 to 5 weeks until the spiderlings emerge and disperse. She seals herself into her retreat with the sac and refuses food, water, or any disturbance. This is normal maternal behaviour, not pathology.

Recognise by the visible silken egg sac inside the retreat, an aggressive defensive posture if you approach the enclosure, and (often) a previously observed pairing or, in mated wild-caught females, no pairing at all — wild-caught females routinely arrive already mated and can produce viable sacs months later. Do not open the enclosure, do not attempt to remove the sac, and do not offer food until the female emerges on her own. She may lose noticeable body mass over the guarding period; that is normal and she will refeed aggressively once the spiderlings leave. For sac handling and spiderling care, see the jumping spider spiderling care guide.

Cause 8: Wrong prey size, type, or movement pattern

Jumping spiders are visual hunters with strong opinions about what looks like food. Prey that is too large reads as a threat. Prey that is too small fails to trigger a pounce. Prey that is unfamiliar — a feeder species the spider has never encountered — may be ignored simply because its movement pattern does not match the spider’s learned hunting templates.

Size problems

If the spider backs away from offered prey, raises its front legs in a defensive posture facing the prey, or retreats to its hammock when the prey is introduced, the feeder is too large. Reduce prey size. The general rule: the feeder should be no longer than the spider’s body length (cephalothorax plus abdomen, excluding legs), and ideally about two-thirds of body length. A regal that weighs 800mg can manage a small adult cricket; a 200mg juvenile cannot. The jumping spider diet guide includes sizing tables by spider age and species.

If the spider watches tiny prey crawl past without reacting, the feeder may be too small to trigger a hunting response. Try a slightly larger option or a faster, more erratic species. Flightless fruit flies move more erratically than mealworms and frequently re-engage a spider that has ignored slower feeders.

Type preferences

Individual jumping spiders develop strong prey preferences. A spider raised exclusively on fruit flies may refuse crickets initially because the shape and movement are unfamiliar. A spider that has rejected crickets, roaches, and grasshoppers in turn will often accept caterpillars or flying flies of similar size — the movement pattern, not the species, is the difference. Introduce new feeders gradually, offer them when the spider is at the hungrier end of its weekly cycle (day 5 to 7 for an adult), and rotate types rather than forcing the same one. The feeder insects guide covers the full menu of options and which species accept what.

Cause 9: Insufficient light to hunt

Jumping spiders are visual hunters that depend on adequate light to locate, stalk, and pounce. An enclosure in a dark room, a basement corner, or a shelf that receives little ambient or daylight may leave the spider literally unable to see prey clearly enough to trigger its hunting sequence. Light is not optional husbandry for salticids — it is core hunting infrastructure.

If the spider was eating normally and stopped after the enclosure was moved to a darker location, or if the refusal coincides with shorter winter daylight, insufficient light is a likely factor. Provide a consistent 10 to 12 hour daily light cycle using ambient room light, a window with indirect daylight, or a small low-wattage LED (no UVB needed for jumping spiders). The jumping spider lighting guide covers safe, simple lighting setups that do not overheat the enclosure.

Cause 10: Senescence (old age) or genuine illness

Illness is the least common cause of appetite loss in a well-kept jumping spider, but it does happen, and it should be considered when every environmental and life-stage cause has been ruled out and the spider has not eaten for an extended period.

Before assuming illness, consider senescence. Adult Phidippus regius and Phidippus audax live roughly 12 to 18 months post-final-molt, females longer than males. In the final 4 to 8 weeks of life, salticids commonly eat very little, become slow, sit in the open instead of in the retreat, and gradually decline regardless of perfect husbandry. This is not a husbandry failure; it is the species’ natural lifespan. For lifespan benchmarks, see the jumping spider lifespan guide.

Warning signs that suggest illness rather than normal fasting or senescence

• Appetite loss longer than 14 days in an adult (outside of pre-molt, male mate-search, or egg-guarding) with no environmental explanation.
• Lethargy or unresponsiveness: spider does not react to prey placed directly in front of it, or to gentle airflow against the retreat.
• Visible physical changes: discoloured patches on the abdomen, mites visible on body or legs, fungal growth (white fuzzy patches), fluid leaking from chelicerae or abdomen, legs curling inward.
• Abdomen shrinking progressively despite food and water being available — suggests internal cause, not surface dehydration.
• Erratic, jerky, uncoordinated movement — a hallmark of Dyskinetic Syndrome (DKS), an umbrella keeper term for movement disorders that often follow pesticide exposure (contaminated wild-caught feeders, room sprays, scented candles, residue on substrate). For visible mites and ectoparasite triage, see the jumping spider parasites guide.

What to do

There are no home antibiotic or antifungal treatments for jumping spiders that are safe for routine use. The best response when illness is suspected is to optimise enclosure conditions (clean, proper temperature, proper humidity, no chemical contamination), set up the humid recovery chamber from the dehydration section, and consult an exotic-animal or invertebrate veterinarian via the ARAV vet locator (source: ARAV). Invertebrate veterinary medicine is limited, and most general-practice vets do not treat spiders, so plan ahead — find a specialist’s contact details before you need them.

For broader symptom triage and the death-curl vs post-molt-curl decision rule, work back through the health signs section in our overall pillar — body-condition reading is the keeper skill that closes 90% of these triage decisions on its own.

Diagnostic flowchart: why is my jumping spider not eating?

Work through the following 7-step decision tree in order. Most cases resolve at step 1, 2, or 3.

1. Is the abdomen plump and the spider responsive? If yes, this is almost certainly normal fasting (pre-molt, post-molt recovery, mate-search, egg-guarding, or “not hungry today”). Continue through the steps to identify which one. If no — wrinkled abdomen, lethargy, or leg curl — jump directly to step 3 (dehydration emergency).
2. Is the spider sealed in its hammock with a dark or swollen abdomen? If yes, this is pre-molt. Wait. Do not feed. Do not disturb. Resume offering food 48 to 72 hours after you see fresh exuvia or the spider voluntarily leaves the retreat.
3. Is the abdomen wrinkled or shriveled? If yes, this is dehydration. Mist immediately for mild cases. Set up the spider-ICU humid recovery chamber for severe cases (wrinkled abdomen + lethargy + partial leg curl). Re-evaluate in 12 to 24 hours.
4. Is the enclosure below 70F / 21C, or in a draughty / cold spot? If yes, warm the enclosure to 72 to 82F (22 to 28C). Re-offer food after 24 to 48 hours.
5. Is the spider a new arrival, recently moved, or recently disturbed? If yes, minimise contact for 5 to 7 days. Most acclimating spiders start eating within a week.
6. Is this an adult male pacing the enclosure? If yes, this is normal mate-search behaviour for terminal-stage males. Offer food twice a week, monitor body condition, accept reduced appetite as part of the life cycle.
7. Is this a female with an egg sac in her retreat? If yes, do not feed and do not disturb until she emerges. Maternal guarding lasts 3 to 5 weeks.
8. Have you tried different prey size, type, or movement pattern? If no, try a smaller or more erratic feeder (flightless fruit flies for picky adults; small house flies for spiders that ignore crickets).
9. Is the enclosure adequately lit (10 to 12 hour day)? If no, add ambient or LED light and retry.
10. If steps 1 through 9 don’t apply and the spider has not eaten for 14+ days outside any known life-stage event: monitor for illness signs (mites, lethargy, jerky movement, discoloration). Optimise environment. Contact an exotic-invertebrate vet through ARAV.

When to see a vet (and when not to panic)

Most “won’t eat” cases never need veterinary contact. Use this triage rule:

Do not panic if: The spider has an intact plump abdomen, is in its retreat, is between feedings, has recently molted, recently arrived, or is a mature male in mate-search. Even 2 to 3 weeks without food is survivable for a body-condition-sound adult. A healthy adult salticid can subsist 2 to 3 weeks without prey under normal conditions, especially if water is available.

Escalate within 24 hours (emergency triage at home + vet contact if available) if: abdomen visibly wrinkled, legs curling, no response to gentle airflow, fluid visible from chelicerae or abdomen, visible mites, fungal patches, or jerky uncoordinated movement.

Escalate to a vet (ARAV) if: any of the above does not improve within 12 to 24 hours of home triage. Find an exotic invertebrate specialist via https://arav.org/find-a-vet/ — invertebrate-experienced vets are rare, and you will save time by locating one before you need one.

Do not attempt at home: force-feeding by restraining the spider, injecting fluids, applying any over-the-counter parasite treatment intended for cats or dogs, or any antibiotic. Spiders are not small mammals — almost every mammalian medication is dangerous or fatal to invertebrates.

Frequently asked questions

How long can a jumping spider go without eating before it is dangerous?

A healthy adult jumping spider with a plump abdomen and access to water can survive 2 to 3 weeks without food under normal temperatures, and wild jumping spiders routinely go a week or more between meals during cold spells or rainy weather Spiderlings have far smaller energy reserves and should not go more than 3 to 4 days without eating outside of pre-molt. If an adult has not eaten for 14 days with no pre-molt, male mate-search, or egg-guarding explanation, work through the diagnostic flowchart above and check hydration first.

Should I try to force-feed my jumping spider?

No. Force-feeding a jumping spider is extremely difficult, carries a high injury risk to the spider, and is almost never necessary. The correct response is to identify and fix the underlying cause — the spider eats when the cause is resolved. The only exception is the assisted-drinking step in the emergency dehydration protocol, where a single droplet on a cotton swab is pressed against the spider’s chelicerae (without restraining the spider) so it can drink voluntarily. That is hydration, not feeding, and it is the limit of safe home intervention.

My spider ate last week but refused food today. Is that normal?

Yes. Adult jumping spiders do not eat on a rigid schedule. A spider that ate 3 days ago may refuse food today because it is still digesting, is in early pre-molt, is slightly dehydrated, is preoccupied (especially mature males), or is simply not hungry. Try again in 2 days. A single refused meal is never a cause for concern in an otherwise healthy-looking spider.

Does the time of day matter when offering food?

Yes. Jumping spiders are diurnal, meaning they are most active and most likely to hunt during daylight hours. Offering prey in mid-morning or early afternoon aligns with the spider’s natural activity peak. Late-evening feeding usually fails — not because anything is wrong, but because the spider has already retreated to its hammock for the night. A spider that won’t eat at 9pm may pounce on the same feeder at 11am the next day. Try the warmest, brightest part of the day.

My jumping spider catches prey but does not eat it. What does this mean?

A spider that pounces on prey, wraps it in silk, then abandons it without feeding is either exhibiting surplus killing (hunting behaviour triggered by movement without hunger), or has caught prey it finds unpalatable. This can happen with feeders that died before being offered (decomposition changes taste) or with chemically contaminated wild-caught insects. Offer fresh, live, captive-bred prey at the next feeding and watch whether the spider consumes it fully. Repeated surplus killing of every offered prey suggests the spider is simply over-fed or chronically not hungry.

Can I feed pre-killed prey if the spider keeps refusing live insects?

Yes, and this is a useful rescue technique for spiders that are too weak or too stressed to hunt actively. Offer a freshly killed feeder (within minutes, not hours) on a thin pair of tweezers, presented gently in front of the chelicerae without restraining the spider. A hungry but timid jumping spider will often take pre-killed prey when it would refuse a struggling live one. Do not leave pre-killed prey in the enclosure for more than an hour — decomposition is rapid and contaminates the enclosure.

Is it normal for a jumping spider to stop eating completely as it gets old?

Yes. In the final 4 to 8 weeks of life, post-reproductive jumping spiders commonly stop eating, slow visibly, and sit in the open rather than in the retreat. Phidippus regius typically lives 12 to 18 months after the ultimate molt; the last 1 to 2 months often involve progressive decline that no husbandry intervention reverses. If your adult spider has been with you for over a year and is showing this pattern with otherwise normal body condition, you are watching natural senescence. Keep humidity stable, offer small soft prey occasionally, and let the animal be comfortable.

My jumping spider is glass-surfing and not eating. What is going on?

Glass-surfing (repeatedly climbing the enclosure walls and falling back, often for hours) combined with food refusal in an adult male is mate-search behaviour. In a female or juvenile, it usually means the enclosure is too small, too exposed, too bright, or has inadequate anchor points. Add cork bark, fake plants, and high perching points to give the spider a defensible territory. Dim the lighting and reduce traffic past the enclosure for a week. Glass-surfing that persists in a well-equipped enclosure warrants the full diagnostic walkthrough above.

Sources

• https://www.britishspiders.org.uk/salticidae — British Arachnological Society overview of Salticidae natural history, feeding ecology, and species behaviour
• https://arav.org/find-a-vet/ — Association of Reptile and Amphibian Veterinarians vet locator (for invertebrate emergencies and ectoparasite treatment)
• https://www.giantspiders.com/captive-care/common-ailments/ — captive-care reference on spider ICU humid recovery chamber for severe dehydration
• https://arachnoboards.com/threads/help-jumping-spider-has-hidden-over-two-weeks-has-not-eaten.353373/ — keeper-community reference on extended pre-molt fasting in sub-adult salticids
• https://community.morphmarket.com/t/new-jumping-spider-won-t-eat/36762 — keeper-community reference on shipping stress and post-acquisition fasting timelines
• https://onlinelibrary.wiley.com/doi/full/10.1111/eth.13519 — peer-reviewed reference (Vickers 2025, Ethology) on female aggression and feeding state in jumping spiders

This article was researched and written by the ExoPetGuides editorial team with AI-assisted drafting. All husbandry parameters and veterinary references were independently verified against peer-reviewed arachnology literature, recognized species authorities (British Arachnological Society), and exotic-invertebrate veterinary guidance (ARAV). ExoPetGuides does not sell spider care products and has no affiliate relationship with any brand named in this guide.

Disclaimer: This content is for educational purposes only and is not a substitute for professional veterinary advice. If your jumping spider shows persistent signs of illness (lethargy, leg curl, fluid leak, jerky movement, visible parasites) after working through the diagnostic flowchart above, consult a qualified exotic-invertebrate veterinarian. Care recommendations may vary by species, individual animal, and local regulations.