Good Crab or Bad?

ErehwoN

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Hitchhiking crab. 1-1.5" across the legs. Keep or pitch?

20220614_141439.jpg

Thanks,

Jim
 
Mithrax female
 
Agree with those above looks like an emerald crab (aka Mithraculus sculptus or mithrax crab). They are awesome for bubble algae, I have 2 in my tank one for each rock structure. They will hide and you may never see them again but they work behind the scenes very well. I only catch mine when at night when the lights go off. Their claws and legs can fall off and be regrown. If he is moving around and still alive, I would personally keep him. Mine doesn't bother anything either, just eats algae off the rocks at night.

Picture of my male one below with his big claws.
1655242207219.png
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

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