Hermit Crabs
November 4th, 2007
Hermit crabs are really interesting animals. They take empty shells from sea snails and live in them for a little while. They have to change shells sometimes, though. If a hermit crab has a shell too small, it won’t grow as fast and it’s more likely to be eaten.
Hermit crabs live all over the world and there are more than 500 different species of them. Most of them live in the water but there are at least 15 different terrestrial species. Even though a hermit crab is called a hermit CRAB, hermit crabs aren’t closely related to true crabs.
Some big hermit crabs can grow to be as big as a coconut and might have a sea anemone on its shell. The hermit crab and the anemone both get a good deal, though. The sea anemone gets the hermit crab’s left-over food and a ride, and the sea anemone scares away all the fish that might want to eat the hermit crab.
A hermit crab reproduces by laying eggs. Once the eggs hatch and the baby hermit crabs come out, they all run to the shore hoping to find an empty snail shell that fits them. To survive, they feed on algae and debris. Some hermit crabs can live up to 30 years (I hope my hermit crab Cow lives that long)!
While we were in Phuket, I found two hermit crabs on the beach. I named one Cow and the other Purple. Cow was cool because his shell was black and white, so he looked like a small cow. I really liked playing with them and hope to see more hermit crabs in Africa, South America, and Antarctica :-).
Fun Facts:
1. Hermit Crabs live in colonies of more than 100 hermit crabs. They don’t do as well by themselves.
2. Hermit crabs are called hermit crabs because they are like a hermit living alone in a cave even though they live in colonies.