Help with ID

stefdvm

Member
I bought a piece of live rock from a LFS recently to help "seed" my tank with Coraline; I also picked up 2 peppermint shrimp and a sexy anemone shrimp - they all came out of the same tank at the LFS. All went into the QT when I got home. It seemed logical to me to search the rock for parasites - found a small starfish which I removed. I also scraped at a small grayish object on the side of the rock thinking it was some type of debris, and it flaked off, only to slowly unroll and slink away. I freaked out a little, but it had disappeared by the time I got something to put it into -- I haven't seen it since, though I have looked for it daily, until tonight, at which point I grabbed it out and put it in a little Rubbermaid container.

It is ovoid in shape, maybe 1cm in length at most, grayish brown, with a few spots, there are dark spots at the base of the stalks on the front end of it; it doesn't feel like it has a shell per se, but the back of it is fairly thick. When disturbed, it rolls up like a taco. It was stuck pretty firmly to the bottom of the QT when I found it tonight (QT is sand free with 3 small PVC pieces for hiding)

I had seen several other critters come out of the rock in the 2-3 days immediately after I acquired it; they were MUCH smaller - more like 1-2mm in length. They were climbing the glass. I plucked one out the first day and took it to work to check it out under the microscope; still don't know exactly what it was/is but I do know that the smaller ones had spiraled shells and a definite "foot" so I'm assuming some type of snail; manager of the LFS says that the only thing she could think of was Turbos as there used to be some in that tank.

Anyway, this one is something entirely different; I'm ASSUMING that this is the same creature that I scraped off the rock on day 1, but it's entirely possible that it's a different one of the same sort, so I want to try to make an ID before I move the rock out of the QT. I got the rock about 10-12 days ago, so that's how long it's been in QT. And it may be unrelated, but the sexy shrimp DISAPPEARED about 3 days ago - it seemed to be fine for the first week and was walking around, I saw it eating - then it was just GONE; no body parts to be found; not like there is really anywhere to hide in the tank besides in the crevices and holes in the live rock, though I think I would have caught a glimpse of it by now if it was simply hiding...

I did the best I could to get a close up pic of the little thing I caught tonight; I've searched the forum and all it's done is make me worry that I have something really funky here. I sent a pic to the LFS manager who just said there used to be sea hare nudibranchs in that tank at some point. I'm just glad I decided to keep in in the QT...
 

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more research... maybe a stomatella snail? of all the pics I've seen, this is the closest in appearance to the creature in the Rubbermaid
 
Yea stomatella, good guy do not toss it and do not toss anymore stars. There a much fewer bad guys that can hitch home than good guys. Chances are it is good.


Other GOOD things you may find hitch hiking on your rock are bristle worms, peanut worms, feather dusters, micro brittle stars, asterina stars, many beneficial types of nudibranch/sea slugs, amphipods, copepods, certain types of isopods, and many many more. These shouldnt be tossed out. To checkout a guide take a look at this link
http://www.lionfishlair.com/hitchhiker.shtml
 
Yea stomatella, good guy do not toss it and do not toss anymore stars. There a much fewer bad guys that can hitch home than good guys. Chances are it is good.


Other GOOD things you may find hitch hiking on your rock are bristle worms, peanut worms, feather dusters, micro brittle stars, asterina stars, many beneficial types of nudibranch/sea slugs, amphipods, copepods, certain types of isopods, and many many more. These shouldnt be tossed out. To checkout a guide take a look at this link
http://www.lionfishlair.com/hitchhiker.shtml

Thanks for the link - I'll check it out; I had read elsewhere that asterinas are bad so I had removed the one I found... glad to know that this one is a good guy
 
asterinas in general are good however that are a few species of asterina that are almost indistinguishable from their relatives and they will prey on certain types of coral. but its uncommon which is why some say they are bad because in general its a slight risk having them around.
 
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