Aphonopelma seemanni (Costa Rican Zebra, Stripe Knee Tarantula) 0.75-1" Yearlings
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How big is this one?
Shown to scale on a US quarter. Based on diagonal leg span.
Care overview
Quick care notes for the Costa Rican Zebra, Stripe Knee Tarantula. Full details are in the description below.
How big does the Costa Rican Zebra, Stripe Knee Tarantula get?
Spiderlings start out around 0.5 inch, and adults reach about 6 inches in diagonal leg span, so plan on upsizing the enclosure as it grows.
What size enclosure does the Costa Rican Zebra, Stripe Knee Tarantula need?
A 6x6x4" enclosure with 2" of substrate works well at this size. Good ventilation is critical. Cross ventilation works best, but ample top ventilation can also be effective as long as the enclosure is not over-misted.
When should I rehouse the Costa Rican Zebra, Stripe Knee Tarantula?
From here, plan on two more upsizes: a 12x12x8" enclosure with 4" of substrate, then a final 18x18x12" enclosure with 6" of substrate. At this species' growth rate, 4 to 6 years to reach adult size, each cage typically lasts around 18 to 24 months before the next upsize.
What temperature does the Costa Rican Zebra, Stripe Knee Tarantula need?
Keep this species between 65 and 75°F, in line with the tropical range it comes from. Typical indoor room temperature works well without any extra heating.
How much humidity does the Costa Rican Zebra, Stripe Knee Tarantula need?
Water it and let it dry rather than keeping it damp. Aim for substrate that dries out within about a day after you add moisture, and never let it sit soaking.
How should I provide water for the Costa Rican Zebra, Stripe Knee Tarantula?
A shallow textured water dish works well, something they can grip when climbing out.
What does the Costa Rican Zebra, Stripe Knee Tarantula eat?
Offer prey around 1/4" at this size, roughly the width of the carapace (head). Feed at least once a week.
What is the Costa Rican Zebra, Stripe Knee Tarantula temperament like?
Docile and unlikely to act defensively, more likely to retreat than stand its ground when startled.
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Description
Aphonopelma seemanni (Costa Rican Stripe Knee Tarantula) 0.75-1" Yearlings
The Costa Rican Stripe Knee Tarantula, or Aphonopelma seemanni, is a tropical tarantula from Costa Rica. Adults of this species have a gray body with bold striped, banded knees that give the species its name. The striped knee pattern is visible from an early age, and we have noticed individuals often show a bluish tint right after a fresh molt that settles back into gray within a few days, while the species only grows to about 6 inches in diagonal leg span. Like others in the genus, along with Brachypelma, this species lives a long time, with females living 20 to 30 years while males live 3 to 5 years. This species is also very calm and forgiving, and one we recommend for beginner keepers or anyone who wants an easier keeping experience. Grab this docile new world tarantula for sale today, offered here as a yearling.
Why do hobbyists keep Aphonopelma seemanni?
- Striped Knee Coloration: This species has a gray body with bold, striped, banded knees that give it its name.
- Docile Temperament: This species is slow moving and very deliberate, not particularly skittish, and docile on top of that.
- Great Beginner Species: A calm temperament and forgiving care needs make this one of the easiest Aphonopelma for a first-time keeper.
- Great Display Species: This species stays out in the open on the surface rather than staying hidden below ground, so there is usually something to see.
- Captive Bred, Not Wild: This is one of the most commonly wild-caught tarantulas in the US hobby, since imported specimens are cheap and plentiful. Every one of ours is captive bred instead. There is no ecological need to collect from the wild when captive-bred slings hatch out every year, and buying captive bred supports breeders rather than pulling animals out of their native habitat. If you ever see a full grown adult of this species selling for unusually little, that price alone is often a sign it was wild collected rather than captive bred.
How should Aphonopelma seemanni be kept?
- Adult Size: Spiderlings start out around 0.5 inch, and adults reach about 6 inches in diagonal leg span, so plan on upsizing the enclosure as it grows.
- Enclosure: A 6x6x4" enclosure with 2" of substrate works well at this size. Good ventilation is critical. Cross ventilation works best, but ample top ventilation can also be effective as long as the enclosure is not over-misted.
- Rehousing: From here, plan on two more upsizes: a 12x12x8" enclosure with 4" of substrate, then a final 18x18x12" enclosure with 6" of substrate. At this species' growth rate, 4 to 6 years to reach adult size, each cage typically lasts around 18 to 24 months before the next upsize.
- Temperature: Keep this species between 65 and 75°F, in line with the tropical range it comes from. Typical indoor room temperature works well without any extra heating.
- Humidity: Water it and let it dry rather than keeping it damp. Aim for substrate that dries out within about a day after you add moisture, and never let it sit soaking.
- Water: A shallow textured water dish works well, something they can grip when climbing out.
- Diet: Offer prey around 1/4" at this size, roughly the width of the carapace (head). Feed at least once a week.
- Temperament: Docile and unlikely to act defensively, more likely to retreat than stand its ground when startled.
Are there any additional notes or considerations?
- Captive Bred: All tarantulas at Exotics Unlimited are captive bred.
- Also Known As: This species is sometimes sold as the Costa Rican Zebra Tarantula. We use Costa Rican Stripe Knee Tarantula as our primary name for it here.
Listing Notes
- This listing is for an Aphonopelma seemanni Costa Rican Stripe Knee Tarantula yearling measuring around 0.75 to 1 inch in diagonal leg span, with the striped knee pattern clearly visible.
- Looking for this species in another size? Check out the 0.50" Spiderling, 1-1.25" Juvenile.
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How we source
100% captive bred tarantulas
Never wild caught.
Never wild-caught tarantulas
No animals taken from the wild for profit
Many bred in house
Our own breeding projects, raised here
Many sourced from US breeders
Domestic breeders we know and buy from directly
Vote with your dollar
Support captive bred and the hobby stops taking from the wild
Wild-caught animals cost less to acquire and carry far more margin, which is the whole reason many sellers list them. Here is the tell: a wild-caught adult Curly Hair costs about the same as a captive-bred spiderling. An adult cannot cost the same as a baby unless something was skipped, and what was skipped is the years of breeding, feeding and care.
Goliath Bird Eaters, Costa Rican Stripe Knees, Curly Hairs and Arizona Blondes all have established captive breeding populations, so there is no reason to take them from the wild at all. If we stop supporting cheap wild-caught adults, more get bred, and they get cheaper. In the rare cases we handle wild-collected animals, such as some centipedes and whip scorpions, the goal is to get them into breeding projects in the hobby.
Straight answers
Costa Rican Zebra, Stripe Knee Tarantula FAQ: price, size, safety and shipping
What keepers ask before buying a Costa Rican Zebra, Stripe Knee Tarantula, answered the way we would at a show table.
Buying and price
Where can I buy the Costa Rican Zebra, Stripe Knee Tarantula?
Right here. We ship captive bred Aphonopelma seemanni (Costa Rican Zebra, Stripe Knee Tarantula) tarantulas for sale to keepers across the US by FedEx Overnight, and you pick your arrival date at checkout. This size is sold out right now, so check the other sizes of this species or browse all tarantulas for sale.
We have been shipping live tarantulas since 2019 and ship Monday, Tuesday and Wednesday.
How much does the Costa Rican Zebra, Stripe Knee Tarantula cost?
This 0.75-1" Costa Rican Zebra, Stripe Knee Tarantula is $45.00 when it is in stock. A sling is the lowest cost way to start the species, and it lets you raise the animal from the beginning.
Pet invertebrate orders over $300 ship free to a FedEx facility, and email subscribers get 10% off invertebrates. Compare sizes and prices across all tarantulas for sale.
Is the Costa Rican Zebra, Stripe Knee Tarantula captive bred?
Yes. Every tarantula we sell is 100% captive bred and never wild caught. Many are bred here in house, and many come from US breeders we buy from directly.
Size and life stage
Is the Costa Rican Zebra, Stripe Knee Tarantula sling hard to keep?
Slings are the most fragile stage, so they need a little more attention than an adult. Use a small enclosure sized to the animal, keep the substrate damp but never saturated and never fully dry, offer pinhead to small prey, and leave it alone as much as you can. They grow fast, so plan to rehouse into a bigger enclosure as it molts.
The upside is that a sling is the cheapest way to start the species and you get to watch it grow up.
How long does the Costa Rican Zebra, Stripe Knee Tarantula live?
New World females commonly live 10 to 30 years, and males live much shorter lives.
That makes the Costa Rican Zebra, Stripe Knee Tarantula a long term pet. Adult size is in the care overview and the description.
Pets and safety
Is the Costa Rican Zebra, Stripe Knee Tarantula a good pet or beginner tarantula?
Yes. We only tag a species Beginner Species when keepers genuinely succeed with it and it is calm enough that we are comfortable sending a first-time keeper a simple care sheet. The Costa Rican Zebra, Stripe Knee Tarantula made that list.
Browse our beginner tarantulas to see the species we recommend for a first tarantula.
Will the Costa Rican Zebra, Stripe Knee Tarantula bite me, and is it dangerous?
A bite is unlikely if you are not handling the animal, and we do not recommend handling. We also will not tell you tarantulas are harmless, because that is not true.
The Costa Rican Zebra, Stripe Knee Tarantula is a New World species. Its venom is mild to moderate, and the real nuisance for most keepers is its urticating hairs, which can irritate skin and eyes.
Can a tarantula escape its enclosure?
Not from a properly closed enclosure, but the honest answer is that tarantulas are better at this than people expect. They can fit through any gap their carapace fits through, push a loose lid, and chew through thin mesh. Anyone who tells you a tarantula cannot climb is wrong.
Use an enclosure with a lid that latches and vent holes narrower than the animal's carapace and you will never have a problem.
What if my partner or parents are not sure about a tarantula?
It is the most common reason a keeper never starts, so it is worth answering plainly. A tarantula makes no noise and no smell, it lives in a container smaller than a shoebox, it eats a few times a month, and nobody else in the house ever has to look at it, feed it or touch it.
If there is a genuine phobia involved, that deserves respect rather than an argument. A small enclosure in a room they do not use is a reasonable place to start.
Can I hold a tarantula?
We would rather tell you now than sell you the wrong animal: no species really wants to be handled. Most experienced keepers never do it, and the risk is mostly to the spider, which is fragile and can be badly hurt by a short fall.
These are animals to watch rather than handle, and the good news is that the interesting ones are visible far more than people expect.
Shipping and guarantee
Can I buy the Costa Rican Zebra, Stripe Knee Tarantula online, and how is it shipped?
Yes. We ship every live tarantula by FedEx Overnight on Monday, Tuesday and Wednesday, and you choose your arrival date at checkout. We check the weather on both ends and hold the box if it is not safe.
Shipping to a FedEx facility for pickup is $29 flat, and it is free on pet invertebrate orders over $300. Home delivery is $49. Every box that needs one includes a heat or cold pack. See the shipping policy or our FAQ page for the full details.
How does the Thrive Arrival Guarantee work?
The Thrive Arrival Guarantee™ means we guarantee your animal arrives thriving, not just alive. An animal that shows up alive but in trouble is not a good arrival, and we do not treat it like one.
Open the box the day it arrives and check the animal. Report a problem within 2 hours of delivery and we reship. Report it within 24 hours and we replace it on your next order. You are still covered, the replacement just travels with your next shipment. We review every case individually.
Getting started
Why is my tarantula on its back? Is it dead?
Almost certainly not. It is moulting. Tarantulas shed on their backs, and it looks exactly like death to someone seeing it for the first time.
Do not touch it, move it, or try to help. Disturbing a moulting tarantula is one of the few things that genuinely kills them. Wait it out, and do not offer food for at least a week and a half afterwards while the new fangs harden.
My tarantula has not eaten in a month. Should I worry?
No. It is close to impossible to starve a healthy tarantula. A month is nothing, six-month fasts are routine, and much longer ones are documented. A refused meal usually means a moult is coming. Keep the water dish full and leave it be.
What do I need ready before my tarantula arrives?
An enclosure sized to the animal, substrate deep enough for its care type, a hide, a shallow water dish, and feeders. Set the enclosure up before the animal arrives so it can go straight in rather than waiting in its shipping vial.
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Everything this animal needs on day one
Enclosure, substrate and supplies, set it up before the animal arrives so it can go straight in.
Enclosure, substrate and supplies, set it up before the animal arrives so it can go straight in.
