What do I do with this guy? Send to sump?

[Billyreef-ita]

Hi everybody, I’ve just found this guy in the tank, what do you suggest? Leave the crab there, maybe beneficial as a cleaner, or dangerous for fishes and corals and try to put it in the sump

 

[Tamberav]

Heavy blueeeee makes it hard to see but the pincher ends look flat, makes me think it is an emerald crab.

 

[Billyreef-ita]

Good or bad?

 

[Tamberav]

Good or bad?

Generally considered good, people buy them for algae control.

They are still a crab and do crab things when hungry. He seems to be pretty happy to help clean up your algae.

 

[NeedAReef]

when you want help to ID it is best to use a filter to remove the heavy blue. we humans do not see that well

 

[MikeReefs]

Let him be unless you see him become a problem then banish him to the sump

 

[Billyreef-ita]

For the time being seems happy to help the cleaning