Help Identifying...

[PhoenixOne]

Tank established for 7 years and I haven't put any new rock/corals for at least 3 years and I am finding these crops growing in at least 3 different locations that are visible. Could be more behind rocks. They react by retracting when something brushes against them. Any Ideas? Thanks.

 

[DCG1286]

Hydroids

 

[PhoenixOne]

Hydroids

Figures that it would be a nuisance type.:banghead: Thought I had a colony of zoas, flower pot or something. Wishful thinking.

Thanks for the help!