Naked fuzzy crabs?

[Lilxxwojo1]

We were checking out the tank before bed and suddenly these fuzzy crabs crawled out of the rock... Can anyone Id them? The pictures are a bit difficult to see the crabs because they blend in so well

 

[kdpuffer]

Are they green in color? If so they look like emerald crabs. They are generally good to have and eat algae.

 

[Lilxxwojo1]

I couldn't tell because of the night glow lighting but I'm pretty sure that's what they are now