ID - weird critter

[Reefmack]

I saw a critter swimming around under my moonlights the other night. It was semitransparent, about 1/2 - 3/4 inch in length, and since I couldn't get a picture of it I made a crude drawing:

It was swimming (I guess you could call it swimming) around the tank, and would occasionally grab on to my live rock with those 2 long antenna type things. Then it would let go after I put a flashlight on it, and take off again. Watched it do this several times.

Any ideas?

 

[KUDA]

Like a jellyfish? Or a worm?

 

[Reefmack]

Didn't look like any of the jelly fish that I've ever seen. The body part was cylindrical - kind of like a long, very thin worm, with those 2 long skinny "legs" that were thinner than the body. weird. I think a lot of its "swimming" was more of just traveling around the tank with the flow, till it got close to the rock, to which it would attach briefly with those two "legs' & then let go & take off again.

 

[Opcn]

was it a large this copepod http://www.oceanpods.com/faq.html

 

[Reefmack]

That would be my best guess, but I'd never seen a picture of any that quite looked like what I saw, and the length of it seemed bigger than any copepods I've seen. May have just been a type rarely seen.

 

[sam75]

just came across this... Any similarity?

here's the link (scroll to the bottom)

http://home2.pacific.net.ph/~sweetyummy42/disease.html

Btw: there's some great ID's on the site!

 

[Reefmack]

Nope, but thanks. Too bulky - this thing was practically colorless and had a much thinner body and even thinner trailing things. Haven't seen it since, but I haven't been doing a lot of moonlight viewing lately. Maybe it perished or the fish ate it.