ID?

[mthtitan]

just spotted this with the lights off in the tank, never seen it with the lights on. Thanks in advance!

 

[Crabs McJones]

Ball anemone. Some consider a pest, I consider a cool hitchhiker. Doesn't really bother anything. Can multiply if not kept an eye on.

 

[mthtitan]

Cool, I’ll let her be for the time being and keep an eye out for them. Thanks!