Tiny brittle stars

[fishes2889]

Since i have moved my aquarium to the 20g long anf rearranged the rock as you can imagine. I have seen so many arms pop out that i have never seen before in all sections of the tank. They don't come out at all during the day but when i turn the lights on a i see alot of them rushing back into their holes. Btw, thay are black and white. And don't seem to be bothering anything. Very weird though because i ahve had this rock for well over 2-3 years and i have never seen any in my tanks before.

Questions:
How are they beneficial?

Anyone have bad experiences with these small stars?

Thanks_

 

[Saltysteele]

very good! eat detritus and debris. they pretty much stay in their holes, waving their arms when food is present, sometimes coming out. they don't hurt anything

 

[ahayes13]

i also have lots of small ones sort of tanish. and all you ever see are the little arms sticking out the holes. they never come out and never bother anything..