It IS a crab. And a really crazy looking one too.
I tied a small piece of krill to a feeding stick and got him to follow it out just enough to see what he was before he stole the krill and ran back into his hole. He is really fast.
He has HUGE purple claws with yellow spikes, slightly hairy, and white and purple legs.
I am going to try and get him to come out again and take his pic.
Anyone know what kind he is?