I don't like citrus fruits very much, but apples, grapes and coconut meat are more loving;
Shrimp with shell, fish is also good, raw and cooked (boiled in white water) can be;
Vegetables are not special, cooked carrots, sweet potatoes, etc. can be fed;
Cereals include miscellaneous grains, rice and corn; Nuts, peanuts, pecans and so on are very loving;
The principle is to change the pattern frequently; Also, crabs don't eat much when the temperature is low and when they are near molting, so don't worry.
Crabs need calcium supplements, such as cuttlefish bones, cooked crab shells and cooked egg shells.