Anyone know what this is?

[cbianco]

...Now to the important question. Do you think that particular worm is a hazard to the tank? We took it out, but since it didn't seem to be parasitic was this a knee jerk reaction?

The first two sentences from the link that Regric25 posted above,

Most common, polyclads are active carnivorous predators and scavengers and can be found feeding on various sessile invertebrates. Some species are herbivores and have specialized on green algae or benthic diatoms. ...

So Allan, which species do/did you have? lol!

Christopher

(Quote taken from: http://www.rzuser.uni-heidelberg.de/...duction04.html )

[allan]

I had the one that was in that video that Rick posted. I can't say that I've seen anything disappearing, and I've never had an algae outbreak save for that green stuff on the glass.

[jpond83]

+1

http://www.melevsreef.com/id/lg_flatworm.html

Just a thought.

[Regric25]

So I personally dont know if its a danger. I took mine out and gave to Justin. I do know that before I captured it my small snails (stomatela snails) were vanishing no reason. All that turned up was the shells. What I do know is when I took it out my snails quit vanishing. I do know they are not parasitic though.