Long clear worm??

[SweetCoralline1]

I am trying to figure out if this hitchhiker worm is okay to keep or not. I couldn't get a photo of it because it is so thin (think strand of hair). It's clear/white and looks like a feather. The worm is straight and has a bunch of arms going down the sides of it. Looks similar to a comb in shape. Any ideas?

 

[SweetCoralline1]

on closer inspection I noticed that this worm is attached to a large clear oval under the tissue of my wellsophyllia

 

[SweetCoralline1]

Attached is a drawing

Attached is a drawing

I tried to draw what this thing looks like...Any ideas?

 

[reefndude]

Is it attached to your rock? If so maybe digitate hydroid. From what I've read they do sting. Usually only see them when lights are out. I also read they will disappear over time.
I started out with a few, next thing you know they were all over my tank. Now they are just disappearing. Still have some but not nearly as many. Didn't hurt anything either.

 

[alexander_ktn]

It's a comb jelly - Coeloplana sp.

It's harmless unless you have too many of them. Cool find

 

[SweetCoralline1]

cool thanks guys!

 

[Cdogsailr]

Definitely a comb jelly! Rare find and good to have (not sure how many reefers have them or even know they have one?). I have one attached under my plate coral and I enjoy watching it feed when the lighting gets low. Mine doesn't extend in the mid day. It has reached nearly 2 feet when it's "fly fishing" for food. It has touched nearly all my corals and has had no effect. However, when I stick my finger in the tank and touch it's tentacle it holds tight as I pull away (no effect on me either). It's also amazing how fast it retracts when it senses danger or it has caught something. Hence the reason it looks like a fly fisherman casting. I've had it for months and don't target feed it anything. I imagine it just takes advantage of my target feeding reefroids to my corals. Fascinating creature!