Aphonopelma seemanni
Costa Rican Zebra / Stripe Knee Tarantula: Advanced Care Guide
Keeper Snapshot: Give this striped-knee tarantula room to dig, a secure retreat and a dependable water dish. Keep a damp area below the surface while leaving drier ground available. Feed to the spider's condition and leave it alone when it seals its burrow.
Group: TarantulasDifficulty: Spice 2: BeginnerSetup: Low terrestrial enclosure with deep burrowing substrate and a damp retreatHandling: Handling is discouraged. Use a catch cup for transfers and keep hands out of the enclosure during maintenance.
Use This Guide Safely
- Confirm the exact animal. Match this guide to the species, locality, size, and life stage on your label. If the ID is uncertain, use the more conservative part of the range and ask before changing the setup.
- Change one thing at a time. Treat temperature and humidity as target zones, then watch posture, burrowing, drinking, feeding, and molt behavior before making another adjustment.
- Respect the handling boundary. If the guide says no handling, fast, defensive, or medically significant, plan transfers with catch cups, locked lids, and no bare hands. For serious bites, stings, or symptoms, seek emergency medical care.
Quick Snapshot
| Temperature | 68-76°F (20-24°C), from The Tarantula Collective's A. seemanni keeper guide. Treat this as a captive-care range rather than a tested tolerance limit. |
|---|---|
| Humidity | No fixed humidity % target. Keep a damp corner extending into the lower substrate, allow most of the surface to dry, and keep the water dish full. Add water along the wall away from the occupied burrow; never flood the retreat. |
| Setup Type | Low terrestrial enclosure with deep burrowing substrate and a damp retreat |
| Substrate | Use firm, diggable soil/coir substrate, roughly half to two-thirds of enclosure height as a keeper starting point. Allow a complete covered burrow and limit open fall height; do not trade burrow depth for a tall empty display. |
| Feeding | Offer manageable crickets or roaches, conservatively no longer than the abdomen. Tiny slings may take small pre-killed portions. Adjust meals to feeding response and abdomen condition; reduce or pause when well-fed or refusing. Remove refused live prey promptly; clear any remaining food by the following day. Never leave live prey with a molting animal. |
| Care Difficulty | Spice 2: Beginner |
| Handling | Handling is discouraged. Use a catch cup for transfers and keep hands out of the enclosure during maintenance. |
Humidity zones: Very Low under 30% - Low 30-60% - Low-Moderate 40-70% - Moderate 60-80% - Moderate-High 70-85% - High 80%+ - Very High 90%+
Enclosure Format / Size Class
- Small spiderlings: a secure sling enclosure or Baby Buddy only if its vents retain the animal and it provides a complete retreat, molt space and accessible water.
- Larger animals: a Burrow Buddy only while its actual dimensions meet the animal's burrow, turning and molt-space needs; otherwise use a deeper custom enclosure.
- Scale the enclosure to the animal you receive. A size measurement alone does not establish sex or maturity.
Warnings First
- Can release irritating hairs; keep them away from skin and eyes.
- Keep hands away from the spider; use a catch cup and tools for transfers.
- Secure furnishings so digging cannot make them collapse. Avoid hard objects beneath a possible fall.
- Never leave live feeders with a molting or newly molted spider.
- Do not dig out or flood a sealed burrow just to check on the animal.
Simple Care
- House individually to avoid fighting and cannibalism.
- Secure the lid and check every ventilation gap before adding the spider.
- Provide a firm starter retreat under anchored cork; let the spider change it.
- Keep a damp lower refuge and drier surface choices without sealing the enclosure.
- Check the water dish and substrate regularly; add water gradually away from the retreat.
- Offer manageable prey and remove leftovers.
- Leave sealed burrows and molting spiders undisturbed.
Advanced Keeper Notes
Enclosure & Microclimate
- Choose the enclosure from the spider's measured leg span, the space needed for its burrow, and room to turn and molt. A fill fraction alone does not make a small container large enough.
- Pack the substrate enough to hold a tunnel. It should hold together when gently squeezed, without releasing water; loose dry coir will not make a stable burrow.
- Anchor cork and lightweight web supports securely. Arrange the water dish where it can be maintained without dismantling the retreat.
- Use ventilation and gradual watering together. Surface misting alone may leave the deeper substrate dry; inspect a visible edge rather than watering on a fixed calendar.
Feeding, Growth & Maintenance
- Offer prey near the retreat and close the enclosure promptly. Do not hold food against the fangs with tongs.
- Young growing spiders need smaller portions and closer observation than larger well-fed animals. The abdomen and feeding response are more useful than a rigid feeding calendar.
- If the spider refuses, remove the feeder and keep water available. Do not repeatedly disturb it with more prey.
- After a molt, wait until the new fangs and body have hardened before offering food. Do not use a fixed number of days for every size.
- Remove accessible prey remains and boluses without tearing apart established tunnels.
Possible Origin / Range
- Likely native range: El Salvador, Honduras, Nicaragua and Costa Rica. The collection locality of this stock is unconfirmed.
- Habitat translation: The practical goal is a sheltered burrow with access to both damp and drier substrate. This follows captive A. seemanni care, not a reconstructed climate for an unknown collection site.
Advanced Keeper Details
- Hidden periods are expected in burrowing setups. Maintain water and the enclosure without forcing the spider into view.
- Persistent loss of condition, injury or difficulty molting warrants advice from a veterinarian experienced with invertebrates.