Worm? Tunicate? I dont know.

[EricHL]

Hi Reefers.

Can somone help me identifying this.... Worm? Tunicate?
There are around 8 of them distributed over the whole rock.

Here is a picture:

Thank you and best regards
Eric

 

[Tahoe61]

Looks like Tunciate to me. Do they close when you disrupt the water around them?

 

[EricHL]

Hi Tahoe

Yes they do close when I disturb the water. Another point which may support the assumptioon of a tunicate is that these openings tend to appear in pairs.

Update: After staring at the rock for.... some time... I can add that those openings make a short "closing movement"or "capturing movement" from time to time. The movement is over in less than 2 sec.

Thank you and best regards
Eric