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The mature pinktoe tarantula has a dark-colored body and pinkish feet, hence its name. Juvenile specimens, however, have pinkish bodies and dark-colored feet and undergo a reversal in their coloration as they approach adulthood at 4–5 years. A fully grown Pinktoe tarantula can grow up to six inches in length. They have a short lifespan, with males living 2–3 years, and females living between 6–9 years.

Dimorphism has been shown in the mature stages of males and females, with males having uniformly barbed urticating hairs, while females are found only at the proximal end. Mature males also exhibit a pair of hooks on the last segment of the pedipalps, used during construction of "sperm webs" and courtship behaviors.

They are an ambush predator, using webbing as a trap and to sense movement from prey. With an enriched environment, they can display an array of behaviors such as active hunting, foraging, and even construction such as nest and tunnel building with nearby debris. The pinktoe tarantula consumes mostly insect prey and is an aggressive feeder. Some of its prey includes crickets, wax moths, grasshoppers, cockroaches and small tree frogs. They sometimes consume small lizards such as Anolis, but vertebrates usually are not a major contributor to its diet.