Hermit crabs can live a very long time: about 30 to 40+ years in the wild , and often 10 to 20 years in good captivity conditions. Many pet hermit crabs live much less than that when care is poor.

Quick Scoop

  • Wild hermit crabs: commonly around 30 years , with some reported past 40 years and even up to 50 years in favorable accounts.
  • Pet hermit crabs: 10 to 20 years is possible with proper care, but many live less than a year if their habitat is wrong.
  • Their lifespan depends heavily on temperature, humidity, food, water, and shell availability.

What matters most

If you’re thinking about a pet hermit crab, the big difference is care quality. Proper enclosure setup can dramatically extend lifespan, while bad conditions can shorten it fast.

Bottom line

A hermit crab is not a short-term pet; with the right setup, it can be a decades-long companion.