Is this a good crab?

[siavashv]

I found this guy in one of my acros... I have good water parameters but some of my acros especially my millies are suffering. They are getting RTN it seems like. Can someone help? Other than telling me if this crab is good or not?

Thanks
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[sharkbait]

He appears to be a Acro crab, I have one in my table top acro colony. If he is a Acro crab then he is perfectly fine.

 

[lilrobb]

Not an Acro crab, they're also called bandit crabs for the black line over their eyes.
This one looks rather nasty...

 

[merkywater]

Looks like a teddybear crab NOT a good one if it is!

 

[mvm]

BAD! No doubt. I bought an acro colony that had one in it that the lfs told me was a acro crab. Polyps started disappearing, causing STN. Kill it!!

 

[hud3339]

Throw him in ur sump

Edit: Throw him in ur sump

 

[valierran]

what would happen to him if you threw him in the sump? would he just live there?

 

[mvm]

Yes.

 

[rolo65]

its a bad one.....they end killing off a large potion of acros and more or less make a burrow in the colony...

 

[siavashv]

No wonder my sps is suffering. I took him out and will feed him to the lions! Thanks guys.