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.
Fiddler crabs are scavengers and in the wild they eat organic matter that they find within the sand or mud. In captivity they eat sinking crab food which is meant for scavengers and made from shrimp, freeze dried plankton, or other things that the fiddler crabs find tasty. Sliced zucchini is also considered a nice treat for these little guys. Depending on which food you choose for your crabby friend, it is recommended to feed them 4-6 pellets every other day or to sprinkle a little food to them each day and let it sink. It is also recommended to remove uneaten food every 24 hours to prevent the growth of mold and bad odors. Be sure to read the instructions on the food you choose because that will give you the recommended amounts to feed your fiddler crab buddy.
In the wild they are scavengers. In captivity, they will eat sinking crab food or fish food.
If you keep one in captivity, they need some salt in their water since that is what they have in their natural habitat.
Add salt so the specific gravity of around 1.005 - 1.010 There are very inexpensive devices sold to measure specific gravity of water.
Sea Gulls and other aquatic birds of prey.
they can eat hermit crab food or frozen lobster thingys or sinking pellets also they eat algae and other microscopic organisms. you can find them at your local pet shops.
plankton
food
YES !
yes, if you are trained and know how to do it
It is all up to you. I like hermit crabs better, though.
Yes you can keep crabs as pets....you can buy fiddler crabs and hermit crabs in most pet and aquarium stores.
they eat humans fiddler crabs eat other smaller crabs
by rubbing their big claw on there body
Ghost crabs? Well that depense if it is a dead fiddler crab so it would be the same/
yes they are
no
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?
no they are not
fiddler crabs drink fresh water.