ID on a hitchhiker

[gojk]

Hey all, I need help IDing a hitchhiker. The hitchhiker in question is on the frag of zoas. It seems to react to light. It will close its "mouth" when it feels threatened. Seems to be 2 of them on this frag.

Any help is appreciated.

 

[tcamos]

From what I can see in the photo those are solitary tunicates. Harmless filter feeders.

 

[gojk]

OK. Great. Thanks!

 

[Mael]

cant tell if tunicate or feather duster but both are the same, harmless filter feeders as Chad mentioned.

 

[tcamos]

Here's a good picture of one. They are sometimes called sea squirts. They take on various forms but are generally similar in their siphons. The one in the photo is wide open.

 

[Mael]

ah ok, I have a few of those around the in the tank, assumed it was some sort of sponge, good info.