Such a thing as too many brittlestars?

[Frozenocean]

Quick question....Is there anything wrong with too many brittlestars in a tank?......I have quite a few small brittlestars that come out at night and when I turn the pumps off for feeding....they seem to be in every nock and cranny in the tank....& always pulling them off of pumps, out of filters etc.

I'm thinking that they aren't doing any harm and they aren't roaming around everywhere......biggest one if seen is probably 5cm from tip to tip....mostly little guys about 2cm across....

Thanks,