white spider looking critter

[barmstrong]

Hello all,
I was looking into my tank at night and notice this little white thing on the glass. the body was about an 1/2 inch long, kind of little worm body, with a lot of long tentacles extending form the other end. I don't have pictures, because i have yet learned to take them yet. when i flicked the light on, after a few minutes, it went into a ball and fell of the glass into the sand. Any ideas.
B

[LTJGAlex]

Sounds like a lettuce nudibranch. Safe, eats algae.

A pic:

http://www.fitermania.com/75gallonreef/postcards/images/lettuce_nudibranch.jpg

[JuanGil75]

Hey Barmstrong did it look like this? Not very clear but the best one I could find I had. If so they are pods!

http://www.thegils.com/images/fishtank/pod.jpg

Juan

[Paintbug]

sounds like some type of spaghetti worm to me. they have been known to climb the glass at night. heres a link with just a few marine worms. http://www.coralreefnetwork.com/stender/marine/worms/worms.htm

[Randall_James]

Lettuce slug sounds to big, pods do not usually ball up and fall, I like the worm idea. Sounds sort of spaghetti to me also.

[JuanGil75]

Actually the small ones I have never seen it happen. the ones in my tank are about the size he describes. When I shine a flash light on them they will either run along the glass or ball up and fall to the CC and hide in it.

[Randall_James]

well running rules out worms, back to the pod theory, amphipods, copepods will hide in substrate if disturbed.

[LTJGAlex]

Yeah not sure. I thought it would be a lettuce, mine often balls up and falls if he wants to get to the other side of the tank quicker.

[barmstrong]

Well, did some research on worms and all, but could not find anything like it. I seen it again yesterday. I know it is not any of the nudis, nor is ia a pod. I really kind of looks like a tiny jellyfish with a long body rather than round. When I get the picture taking thing together, hopefully i can get a good pic of it and post.

[lossman]

check out this thread. It has a picture which might be what you have.

http://archive.reefcentral.com/forums/showthread.php?s=&threadid=661935&highlight=hydroid+jellyfish

[Paintbug]

does it swim or just fall off the glass to the sand? it may be some type of tube worm looking for a new home. if it swims it may be some type of jellyfish