more than 500 species of hermit crabs in oceans all over the Earth. Most
of them must live under the sea water to survive, though they can usually
stay out of the water for a short time.
In warm climates, there are a few hermit crab
species which live mostly on the land rather than the ocean. You may have
seen some of these in the pet stores.
The most common land or terrestrial hermit crab
seen in the stores in the U.S. is Coenobita clypeatus,
sometimes called the purple pincer hermit crab. They are found in the wild
from the southern tip of Florida south to Venezuela, and on the islands of
the Caribbean. They need a warm climate to survive, so if you have one as
a pet be sure to keep the temperature close to 75 degrees F (24 degrees C).