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Hermit Crab

Lifespan: Up to 10 years
Size: 2-6 inches long


  • A hermit crab’s diet should consist of:
    • 75% commercial hermit crab diet
    • 10% fresh or freeze dried veggies/fruit
    • 5% freeze dried shrimp
  • Avoid these foods:
    • “Junk” foods
    • Salty snacks
  • Treats may consist of:
    • Peanut Butter
    • Tropical fruits (mangos, papayas, etc.)

Caging & Environment

  • Hermit crab cages should be made of glass or plastic; they should be enclosed to hold in humidity.
  • Caging should include a food bowl, climbing branch, plastic plants to hide in/climb on, and two water bowls with sponges [one for saltwater, one for freshwater].
  • Crabs should misted daily and have a low wattage heat lamp to help keep the humidity at the appropriate level.
  • Sand is a great substrate to use; it allows for easy cleaning. A mixture of shredded coconut husk and sand is also acceptable as it allows for easier burrowing.
  • Provide a cuttlebone for calcium needed when molting.


  • Hermit crabs may unintentionally pinch you if they feel like the are falling.
  • It is always best to create a stable platform with your palm flat for the hermit crab to rest on. A cupped hand might be an invitation to pinch!
  • Once tamed, hermit crabs are very friendly and love to explore. Give your hermit crab time out of the cage frequently.
  • Hermit crabs should be bathed 1-2 times weekly, and at any time that you notice your hermit crab emitting a fishy odor. Use lukewarm de-chlorinated water and submerge the crab for 1-3 minutes [no more than 3 minutes as they can drown]. Swirl the water with your hand during this 3 minute period to ensure that the gills are being flushed.
  • Hermit crabs will eat mostly in the evening hours, so don’t be alarmed if you never observe your hermit crab eating.
  • Provide your crab with multiple empty shells that are larger than their existing one. This allows them to choose their new home!
  • Always provide a calcium block or cuttlebone for your crab! It gives them extra minerals that they need when they are molting (shedding their exoskeleton). You should also allow your crab to rest when molting, as they can become easily stressed.