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Emerald Crab

So I went and got a Emerald Crab (female) to help with some of the algae. Well last night I'm doing my normal night time spot lighting and I see it perched on my purple stylo. From what I seen it wasn't eating it just perched up on it. Should I be concerned? When I looked today the stylo looked completely normal so I don't know what to think. Should I keep and eye out to see if its a reacuring thing then be worried, or just get it out now just to be safe?
 
So I went and got a Emerald Crab (female) to help with some of the algae. Well last night I'm doing my normal night time spot lighting and I see it perched on my purple stylo. From what I seen it wasn't eating it just perched up on it. Should I be concerned? When I looked today the stylo looked completely normal so I don't know what to think. Should I keep and eye out to see if its a reacuring thing then be worried, or just get it out now just to be safe?

Maybe it is confused and thinks it is an acro crab?
Just watch it...I never had any problems but some folks do.
 
Maybe it is confused and thinks it is an acro crab?
Just watch it...I never had any problems but some folks do.

I've heard of people having problems when they get BIG, but most say the small females don't bother anything. I'll keep tabs on her to make sure it doesn't overly stress the coral.
 
Never had a problem with mine. They will hank gout on the corals, picking at who knows what but never hurt any since I've had em.
 
Never had a problem with mine. They will hank gout on the corals, picking at who knows what but never hurt any since I've had em.

This is what I'm hoping. It just makes me nervous because when I had 5 in a 75 gal I never seen them on any corals, now I have one and second night in its hanging on my stylo.
 
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