arrow crabs

[JOSH]

id like to to add one of these guys to my tank, his tankmates will be in the future a false clown, sixline wrasse, cleaner shrimp, fire shrimp, and a couple snails. i will also have lots of differnt soft corals. now some sites say they leave corals alone others say they nibble on them, some people say they will y it catch fish as well. but a crab that size seems like theres no way it could take down a clown.