ID on an alien in my tank

[Reefing_addiction]

Ok so whatever it is doesn’t seem to move. It has only two protrusion that I can see. It blends in the the rock. The picture shows you where it is the video shows it retracting. Tomorrow I have to do a water change and pull a rock out for some scrubbing. So no matter what tomorrow I will see what’s on the back side of the rock. But any guesses?

 

[JGT]

Spionid worm.

 

[Reefing_addiction]

Spionid worm.

It looks more like slugs eyes or the things a slugs eyes are on vs that worm. And it’s squishy

 

[Reefing_addiction]

When I feed the tank I’ll see if it tries to catch anything

I didn’t notice it trying to catch anything today at feeding time.

 

[JGT]

Spionid are called worms but they don’t look like worms. Look more like vermetids but the telltale sign is the 2 tentacles that poke out. Builds a Tube with mucous. Pics aren’t the best so going on what I can see.

 

[WV Reefer]

Ok so whatever it is doesn’t seem to move. It has only two protrusion that I can see. It blends in the the rock. The picture shows you where it is the video shows it retracting. Tomorrow I have to do a water change and pull a rock out for some scrubbing. So no matter what tomorrow I will see what’s on the back side of the rock. But any guesses?

If it “reacts” and has two openings it could be a tunicate.

 

[Reefing_addiction]

Spionid are called worms but they don’t look like worms. Look more like vermetids but the telltale sign is the 2 tentacles that poke out. Builds a Tube with mucous. Pics aren’t the best so going on what I can see.

Do I leave it or remove it?

 

[JGT]

They aren’t a prob. Good detritus feeders.