Skeleton Tarantula (Ephebopus Murinus): Info, Care, Pictures & More

The Skeleton Tarantula (Ephebopus Murinus) is a New World terrestrial tarantula species that is well-known for its unique skeleton pattern. They natively inhabit the rainforests of Brazil, Frech Guyana, and Suriname, but are also highly desired as pets.

With over 800 tarantula species having been identified globally, it can be difficult to decide which species suits you best as a pet. Today, we’re taking an in-depth look at the Skeleton Tarantula to discover whether this unique spider is a good fit for you.

So, if you’re interested in adding this species to your collection, then continue reading! 

Psychonaught, CC0, via Wikimedia Commons

Skeleton Tarantula Care Sheet

Species NameEphebopus Murinus
Family NameTheraphosidae
Common NameSkeleton Tarantula, Yellow Knee Skeleton
CategoryNew World
Native LocationBrazil, Guyana, Suriname
Leg Span4.5″ for males, 6″ for females
Growth SpeedMedium
Urticating HairsYes
DietCrickets, roaches, mealworms. Also capable of feeding on small mammals in the wild.
Temperature75 to 80 Fahrenheit
Life ExpectancyFemales, 15 years. Males, 3 to 4 years
Recommended Experience LevelIntermediate/Advanced
Minimum tank size18”x18”x12”

The Skeleton Tarantula: A brief overview 

The Skeleton Tarantula is also sometimes referred to as the Yellow Knee Skeleton. Its scientific name is Ephebopus murinus. This peculiar spider lives on the forest floors in the Americas, making it a terrestrial New World species.

The exact location where the Skeleton Tarantula is found is Brazil, Guyana, and Suriname. The damp and warm climate of these countries makes for the perfect natural habitat for this unique species. The environment of Brazil is tropical throughout the year with a few months of very heavy rainfall. 

They are a fossorial species and were first found 6-8 inches below the ground, in burrows. 

The interesting thing about this particular tarantula is that when it comes to keeping them as a pet, their lifestyle, behavior, habitat, etc, differs quite significantly from other tarantulas. 

Appearance and varieties 

The appearance of this species is very unique. From its common name, the Yellow Knee Tarantula, it’s evident that they have yellow stripes on their black legs with a brown stripe (in the middle). The carapace takes on a yellowish golden hue.

Their abdomen is a light brown shade. The abdomen of this tarantula is quite small compared to that of other species, while their legs are relatively long. 

The skeleton-like yellow pattern can be seen very early on in the Skeleton spiderling. This is because the growth rate of this tarantula is significantly faster in comparison to other species.

Another interesting physical characteristic of the Skeleton Tarantula is its size. Compared to some other massive species, the average adult has a relatively small size. Males are significantly smaller than females. Males typically grow to a size of about 4.5 inches whereas females can grow to a size of 6 inches. 

Coming to the lifespan, females have a significantly longer lifespan of up to 15 years compared to the meager 3 to 4 years lifespan of the males.

The cost of a Skeleton Tarantula 

Irrespective of where you are in the world, getting your hands on a Skeleton Tarantula can be quite a challenge, even if you are in the United States. 

The good news is that even though the Skeleton Tarantula is a rare and exotic species, you can get a sling for as low as $25 to $35. The adult males and the females cost $75 and $100 respectively. Males are typically cheaper because they have shorter lifespans.

So, in terms of buying such a tarantula, it’s going to be quite affordable. 

Typical behavior and temperament 

It’s best to have some amount of experience if you play on keeping this tarantula. Being an intermediate or experienced keeper makes you better suited to care adequately for this spider. This is primarily because of their temperament and behavior which can be tricky for newcomers.

The Skeleton Tarantula isn’t a tarantula that you can hope to be hands-on with. Although their venom is of mild toxicity and is thus not all that dangerous to humans, they do have a defensive demeanor. You may experience a strong stinging sensation with a sharp bite if they manage to set their fangs into you, which is something they will definitely try to do if they feel threatened.

Their small size combined with their agile nature allows them to move around quite quickly. So, don’t try to be very hands-on with them and be careful when interacting with them. 

In terms of temperament, although they can seem quite aggressive, they’re more defensive and are more likely to flee than fight in an encounter with the predator. Like other new world species, they also have urticating hairs which they can kick when they feel threatened. An interesting difference between the Skeleton Tarantula and other new-world species is that they kick their hair from their pedipalps.

Taking care of a Skeleton Tarantula: A how-to guide 

Tank size

Owing to the fact that the Skeleton Tarantula is a terrestrial and burrowing species, the ideal enclosure for such a species would be an 18”x18”x12” glass terrarium. This size is perfect for adults because it’s enough for them to be able to dig their burrow. Secure doors are necessary given that they tend to move around fast. 


This spider requires a humid environment to thrive. However, make sure that the cage isn’t damp, just humid. 80% humidity is ideal. You can do this by slightly overfilling the water bowl or spraying one side of the cage a few times a week. 


Although this species originates from a tropical environment, it doesn’t require very high temperatures to survive. The ideal temperature range would be between 75-80°F. 


It’s best to have at least 6 inches of substrate for this tarantula as they are a terrestrial burrowing species. Ideal substrate options for such species are soil-based ones or sedge peat and Coco fiber. 


Cage furnishings for their enclosure include a sizable hide. This is a must. Apart from an adequate hide, you can include plants, rocks, and moss in the enclosure. 


Remember to keep a water dish in the enclosure at all times. Keep a shallow water dish to avoid any drowning possibility and change the water in the dish regularly. This is to avoid health complications arising out of fungal or algal growth. 

What to feed a Skeleton Tarantula 

image source: Reddit

The good news is that this species is not a fussy eater. Roaches, mealworms, crickets, and other insects are perfect. You can also feed them small mammals such as mice (pinkies). However, these small mammals should only be given occasionally. It’s best to avoid creatures that are bigger than the tarantula’s size in order to keep them safe.


Before you start breeding make sure that the female is well-fed, as this makes her more receptive to the male’s advances. In addition, breeding should be done soon after molting. The reason why is because females are unable to produce a viable egg sac while molting. 

If the female is well-fed and has recently molted, place the male into the female’s enclosure. Keep an eye on them to see if everything goes okay. If something goes wrong, separate them. Also, separate them after they’ve successfully bred. 

The female tarantula’s egg sac (created within four months after breeding) houses 50-100 spiderlings. 

Remember that this tarantula is best kept by a keeper with an intermediate to advanced level of experience and that breeding is not something you should attempt to do on a whim. Proper breeding is difficult and will result in hundreds of slings which can be difficult to house. It’s best to leave the breeding to experienced experts.

Final words: Is the Skeleton Tarantula right for you?

The Skeleton Tarantula is without a doubt a unique-looking spider. The skeleton pattern that gave them their name is a feature that separates them from the other species. As a result, they’re highly desired among people in the hobby.

With that being said, they’re definitely not for everyone. Experienced caretakers might be able to handle them, but newbies are better off getting their feet wet with a more docile species like the Antilles Pink Toe or Greenbottle Blue first.

Jesse A.