Sorry, another ID help..

[Hlothran]

Wondering what these little yellow polyp looking things are. There are quite a few of them, not sure if they are a form of algae or something else. My friendly crab that I posted last night has decided these are pretty tasty so makin me wonder..

 

[SurfTrack]

harmless sponges

 

[Hlothran]

Which basically means the crab has a taste for sponges. No shock there.