If you mean land hermit crabs, no, they don't. Hermit crabs of all sizes can get along just find as long as you:
1. Have enough room. Think of it as 3-5 gallons per crab needed.
2. Are feeding them protein and calcium along with fresh fruits and veggies.
i cant yes or no i would say kind of sometimes they would be separated and learn to take care of themselves
Hermit crabs are hatched from eggs, therefore there is no parental figure for the baby hermit crabs. Once the mother lays her eggs, she moves on (similar to turtles).
Actually, you can't make your crabs have babies in captivity, they can only reproduce in the wild because they lay their eggs in the ocean.
Yes, bananas are good for them!
Well, a hermit crab can have a baby in there shell.
poop
Yes. But, the older crabs may bully the younger ones. And a larger tank would be a necessity.
it doesn't makes the baby then they leave and the baby raise its shelf
The adults usually eat the baby guppies.
Yes, land hermit crabs do mate. If you mean in captivity...yes and no. They will mate and sometimes you will even get fertilized eggs, but you can not raise them to be surviving baby hermit crabs in captivity unless you can duplicate the ocean.
hermit crabs need a beach to lay their eggs on so they wont have babies in their cage.
I wouldn't. Just feed them regular hermit crab food you find at a pet store.