you can get pellet food for crabs ( like HBH crab & lobster bites) at most aquarium/fish shops.. they also eat freeze dried or frozen bloodworms (some prefer frozen), you can give them a slice of fresh fruit or veggies (zuccini or cumber) every now and then as a treat.
No but they eat dead fiddler crabs.
they eat humans fiddler crabs eat other smaller crabs
YES !
Fiddler Crabs eat Plankton.
Yes you can keep crabs as pets....you can buy fiddler crabs and hermit crabs in most pet and aquarium stores.
they eat mole crabs
ThierAunts.
yes
no
plankton
Yes.
It is all up to you. I like hermit crabs better, though.