one more to identify

[saywill]

what this, other than a feather duster, is there a scientific name?

 

[Devilishturtles]

Look like colonial hydroids to me. Another thing that you want to control. Check out this page for lots of info, and pictures.

http://www.wetwebmedia.com/hydrozoanfaqs.htm

 

[johnmaloney]

Hard to tell if they are hydroids. Good pictures though!

 

[Sadielynn]

Yep those are hydroids . They can sting corals as well