Experiment397;4502210; said:well is it salt or fresh water? cause if its fresh, then thats a red claw crab. if its salt water then i cant help ya man.
Kevin8888;4502348; said:I'm leaning towards one of the Xanthidae... The Xanthidae family of crabs are the most agressive crab verieties. They not only eat what ever they can get from fish to corals to snails to other crabs, but they will also destroy your live rock, as wile they grow they make the hole they are hiding in bigger, which slowly gets bigger and bigger until it becomes a structural problem.
SO... your best bet is to remove and feed to a crab predator(so its not wasted haha).
thanks i was looking for something like that...Kevin8888;4504950; said:Not gorilla crab... at least not like the ones ive seen on a quick search, BUT crabs with black claws are almost always agressive predators. I'm still leaning towards my origonal ID, but even if I'm wrong, all crabs are omnivors so when they get big enough, they WILL eat anything the like.
Here is a link to most of the Xanthidae crabs, keep in mind colours/patterns can very from crab to crab.
http://www.flmnh.ufl.edu/reefs/guamimg/crustacea/xanthidae/index.html