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I dont think its an emerald crab. Definitely a crab though. It looks like a gorilla crab to me but its hard to tell in the pictures. If thats the case I would banish it to your sump or refugium if you have one. Ive heard they can have an appetite for coral.Can you set up a trap so you can examine it more closely? Could be an emerald crab (usually good) or something more sinister...
Unless it’s a widow, then she’d eat that frightening spawn of ghost crabsIt's too tiny to trap. It goes back into the zoa rock soo fast too. Seems to have hairy legs like emerald but sooooo tiny and that face only a mother could love
OMG. He is tiny! That algae wafer is easily three times the size of him. Either that or that algae wafer is huge! Haha.Trying to get better video ...