It depends on where you find them. Are they in the rocks or tidepools. They are just small crabs waiting to become big crabs like you find in the ocean. Otherwise, are they in the sand, they are actually called sandcrabs. Sandcrabs are usually grey or silver in color with many legs and look kind of like "rolly pollys". You can dig for them each time a wave goes back out to the ocean. The crabs in the rocks, or the tiny, tiny ones you see on the sand are just little crabs that have hatched and are waiting to become big crabs before they go out to the ocean.
small hermit crabs
red crabs
No hermit crabs are small and friendly
Hermit Crabs sense by making a small chirping noise.
yes
There is no difference in size between female and male hermit crabs.
Small fish, plankton, and other hermit crabs
They are small as a pea.
Yes, bananas are good for them!
Hermit crabs have NEVER reproduced in captivity. If yours do, call the news.
Yes they do, however very small.
A lot
No, Hermit Crabs are omnivores.
Hermit crabs excrete is so small, you have to look hard to see it, hermit crabs store it in their shells then scoop it out. It is dry.