Hitch-hiker ID

[wkada]

Anyone know what this is? Came on a coral I picked up today. Should it be removed? poor quality pics but the best I could do.

[Jonthefishguy]

This looks to be a crab from the Xandrid species. This is not truly a reef safe crab. The only crabs that should be in corals are Tetralia and Trapezia species.