How Long Do Tarantulas Live? Lifespan by Sex and Species Type

Most pet tarantulas are mygalomorph spiders, a group known for longer lifespans than many other spiders. Cornell notes that male mygalomorphs stop molting after sexual maturity, while females may live up to 25 years. In practical pet care, many commonly kept female tarantulas live roughly 10 to 20+ years, and some species may exceed that with excellent care.

Males usually have a much shorter timeline. They often grow faster, mature earlier, and then live only months to a few years after their final molt. That is why two tarantulas of the same species can have very different expected lifespans depending on sex.

Female tarantulas usually outlive males by a wide margin. After maturity, females continue a slower, longer life pattern and may keep molting periodically. Males, by contrast, typically undergo a final maturation molt, develop adult breeding features, and then stop molting. Once mature, they often spend more time roaming and less time feeding, which is part of why their remaining lifespan is shorter.

For many popular pet species, a female may live 3 to 5 times longer than a male. In broad terms, pet parents can expect many mature males to live about 1 to 3 years after maturity, though some live less and some a bit longer depending on species and husbandry. If longevity is important to your household, sexing the tarantula before purchase matters.

Species type affects lifespan because growth rate, adult size, habitat style, and molt frequency all play a role. Terrestrial New World species such as many curly hair, rose hair, and red knee tarantulas are often slower growing and longer lived, especially females. Arboreal species and some faster-growing Old World species may mature sooner and often have shorter overall lifespans, particularly males.

A useful rule of thumb is this: the slower the species grows, the longer the female often lives. Pet parents should still avoid relying on one exact number, because captive lineage, age at acquisition, and molt success can shift the real outcome.

Husbandry has a real effect on longevity. Tarantulas do best when their enclosure matches the species' natural style, including appropriate substrate depth, hiding areas, ventilation, and humidity needs. Cornell warns that falls can be catastrophic for tarantulas, especially heavier terrestrial species, so enclosure safety matters as much as feeding.

Molting is another major factor. A tarantula that is dehydrated, stressed, injured, or housed with feeder insects during a molt may be at higher risk for complications. Good hydration, species-appropriate humidity, and removing uneaten prey before a molt can help reduce preventable losses.

It is hard to know a tarantula's exact age unless it was acquired as a spiderling from a breeder with records. Size alone is not reliable because growth speed varies by species, sex, feeding schedule, and temperature. A large male may actually be younger than a similarly sized female because males often grow faster.

If your tarantula has recently matured, sex becomes especially important for estimating remaining lifespan. Mature males may show longer legs, a leggier body shape, and species-specific reproductive structures. Your vet may also be able to review molt history and photos to help you make a more realistic estimate.

Aging in tarantulas is subtle. You may notice slower movement, longer fasting periods, less interest in exploring, or more time spent in a hide. Those signs are not always a problem, because healthy tarantulas often go through quiet periods, especially before a molt.

More concerning changes include repeated failed molts, inability to right themselves, a shrunken abdomen, persistent weakness, trauma after a fall, or signs of dehydration. Those issues are not normal aging and should prompt a call to your vet, especially if your tarantula is a valuable breeding female or a long-lived species you expect to keep for many years.

The best longevity plan is steady, species-specific care. Keep the enclosure secure and escape-proof, avoid unnecessary handling, feed appropriately sized prey, and maintain the right humidity and ventilation for the species you keep. Remove uneaten insects promptly, especially when your tarantula is refusing food or showing premolt behavior.

It also helps to keep a simple care log with molt dates, feeding response, enclosure changes, and any injuries. That record can help your vet spot patterns early. For a pet that may live well over a decade, small husbandry details add up over time.