Anyone know what this is?

[Milly]

My dad and I were setting up my 75G and came across this.. At first we figured it was something that had died, but when I scooped it up in the net, it was moving in a snake like way? It takes a jelly like form when outside of the water, but pictured below you can see how it takes form. Just want to know if anyone knows anything about it, whether it's good or bad? Nudibranch? Suggestions?

10822
http://www.maast.org/images/misc/pencil.png

[tonyydeee]

Looks scary D:

Once when I scooped out a dead fish. there was a HUGE glob of goo around it (when out of the water) and it was heavy...
Lol

[jroescher]

I'm guessing nudibranch. In my opinion, the only good nudibranch is one you intentionally put in. All others are presumed dangerous.

[jroescher]

Check these out:
http://ngm.nationalgeographic.com/2008/06/nudibranchs/doubilet-photography
Looks kind of like #2.

[jrnannery]

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

Just a thought.

[Reefer4ever]

Looks like a flatworm of some sort.

[Third Coast Tropical]

I'm guessing nudibranch.

+1

[Milly]

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

Just a thought.

It looks a bit like that actually. We took it out right away, suckers long gone now!

[Regric25]

That is a polyclad flatworm!! HAHA I caught one alive in my biocube once. They are known to eat small snails and come in a huge assortment of colors. I took some video of it ill post it.

Here i a link to a weath of info on Polyclad Flatworms
http://www.rzuser.uni-heidelberg.de/~bu6/flatintr.htm

W3knOLAk4us

[allan]

Rick, that's the creature! Ours wasn't quite as mobile as yours, but I think it was hungry and running out of energy. We had the new tank up for a couple of days, but aside from what nutrients are in the water from the shared system there isn't a whole lot for it to eat/absorb.

I read the articles, very cool little animal. Basic life form that has no stomach cavity, blood and oxygen delivery system... that's why it's so thin.

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?

[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/~bu6/Introduction04.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.