Critter on the glass

[njbeacher]

There was a thread a few months back where someone asked for an identification of a critter that looked like the attached image. I cannot find that thread as it was a while ago. Does anyone know what it is? It crawls like a snail, but has no shell and is all white.
Thanks.

 

[big]

Looks to be the shape of a "Flatworm" OK if white

not if brown

ones. Small in size around 1 MM or just a bit larger in lenght.
Here is a shot of a white one from a long, long time ago in my tank........ Warren

 

[njbeacher]

I don't think that is it. It is VERY small. I am using a 10x magnifier to see it. Un-magnified, it is about the size of a period. I looked at pictures of flatworms and they show a triangular shaped head. This guy has a rounded head. Thanks for the reply though.

 

[renogaw]

look up copepods

 

[mjessu]

yep...almost guaranteed a small flatworm. I find them in my tank all the time. Most are very small. If they are white...you should be ok. If they are red or brown...you may have a bad problem. I think they can infest a tank very quickly. I hear that the sixline wrasse eats them though.