They hide in their shell.
No, Hermit Crabs and Fiddler Crabs are very different, and require two whole different living conditions. And Fiddler Crabs are very aggressive, and will probably attack the Hermit Crab anyway. So, in all, it just isn't a good idea.
no they will drown
As most people know hermit crabs have gills most animals that breathe under water have gills for example a fish. The hermit crabs gill's can work on land but in order for the hermit crab to survive they hermit crabs gills have to be moist....
no they'll drown
A lot
No, Hermit Crabs are omnivores.
No. Hermit crabs have modified gills, meaning that they need 70-80% humidity in order to breath. However hermit crabs cannot breath under water; they will drown. It is important to have the humidity between 70-80% so the hermit crab can properly breath. Smoke is toxic to hermit crabs and will eventually kill them.
Yes hermit crabs have antennas.
fish and bigger hermit crabs
No hermit crabs are small and friendly
Land hermit crabs don't, they put them on damp sand at low tide, when the tide rises it carries the eggs away.
sea birds, fish, octopuses, crabs, and other hermit crabs