Can't figure out what these are?

[mportel44]

Hey guys new to the forum here. I am having a hard time identifying this organism and would appreciate some input as to what they could be. They are red (started as small specs and are growing quick) and have anemone like behaviors, they feed on brine shrimp and fish pellets, almost anything I place near them in fact. They are only about a centimeter diameter when fully opened. There are probably around a dozen scattered on my rockwork. Any ideas? And thanks in advance

 

[Bifferwine]

They look like ball anemones. They are usually not considered a pest, unless they start multiplyling and spreading.

 

[mportel44]

Thanks so much after looking ball anemones up I think your correct. Thanks for your help I wouldn't have even thought of them actually being an anemone!

 

[bjohanson1234]

I have them in my tank. They seem to come and go.

 

[Smitty]

They've got you covered...welcome to the site.

 

[little_fish]

Hello and Welcome!