please help id

[beagleton]

i noticed a half dollar sized flat (about half a centameter thick) black nudibranch/slug like creature. it has two feelers or tenticles on its head that can retract. at first i thought it was a dark clump of cyano but after watching it move for a while im sure its not. would like to get an id though.

[GaryP]

Without a picture the best any of us can do is definitely ID it as a "nudibranch/slug like creature." Even with a pic the best that most of us can do is identify it as a "nudibranch/slug like creature."

You might try looking here... http://www.seaslugforum.net

Sorry

[bprewit]

dosent look like this by chance does it?
http://www.seaslugforum.net/factsheet.cfm?base=scutus

[Instar]

With the description of "half dollar size" and thin, it sounds round, not worm like. In that case, there are a variety of disc shaped chitons that are occassionally seen as hitch hikers and those meet this description with the feelers, thickness and shape. They blend in so well that they are often not noticed.

[beagleton]

yes bprewit it does look remarkably similar to that elephant slug, ive never seen a shel though and it seems sort of thin to be hiding something like that but that does not mean it isn't there. i was mainly worried about it being some sort of predator but it sounds okay. an algae graser is deffinatly something i am thankfull for. do you know if it is common for something like that to hitchike? ive never put anything like that in my display with the exception of larry's nudi's and a sea hare.

[bprewit]

The lfs close to here used to have them, so I ended up with a couple. I watched them release eggs and sperm into the water once and I guess some of them managed to grow in my fuge as now I have 5 more crawling around in my sump/fuge. I am not sure how common they are but I do have a few and they are pretty cool lookin though dont see them very often as they mainly come out at night. Cant really see their shell especially when they are small but as they get bigger there is a little white line that runs vertical across their back which is the only part of the shell that you can see.