Help id please

[Wweste47211]

Can anybody help me id please they look almost like tiny anemones all over my overflow intake

 

[ISpeakForTheSeas]

Can anybody help me id please they look almost like tiny anemones all over my overflow intake

Colonial tunicates; technically harmless filter-feeders, but they can sometimes become invasive and grow over and smother stuff in our tanks. I usually recommend isolating them somewhere where it's easy to control the spread/remove if needed.

I can't see them well enough to say for sure which, but Botryllus and Botrylloides species can look similar to this.