Yes,they do feel the vibration and if you talk or move they will go back in
for real bastards
Yes.
no they can not But, they can feel vibrations.
When they feel threatened.
yes also that's another way it can hide from something
Yes. The hermit crab usually lives in a pod of 25 or more. So, the more the better. But, hermit crabs can get territorial, so have plenty of space. And, some crabs will pick on crabs of the same size. They feel they are a threat.
Hermit Crabs do pinch! Actually i got pinched by mine earlier today. But it will not hurt you very very bad you just feel some sting. (If you are wondering hermit crabs don't transmit any diseases :) )
A lot
No, Hermit Crabs are omnivores.
Nobody knows due to the fact that they can hide their emotions like a champ maybe they just cry when you arenβt looking. Make sure you care about your hermit crabs so they donβt feel sad as much
Yes hermit crabs have antennas.
fish and bigger hermit crabs
No hermit crabs are small and friendly
Hermit crabs molt when they feel the need to. Nothing is wrong with your crab if it hasn't molted. :)