Unidentified Oddities in my tank!

[ivy2dw7]

The more I stare at my tank, the more I notice things that I didn't put in there! The first thing is this snail-like animal. At first I thought it was a snail on the side of the glass, buried in the sand, and it hadn't moved for I'd say 2 weeks, so finally last night I dug it up, got it to come off the glass and it was alive!! It has a flat shell, it's slightly round, almost like one side of a mussel. Within in a few minutes it found it's way back to the glass and half buried itself and has been in that spot since.
Here's a picture of it on the glass, half buried.

 

[ivy2dw7]

The next has been attached to live rock that I bought uncured, to help cycle my tank. I thought they would have died off during the cycle, but they haven't. And it seems like there might be more of them now. They look like clams attached to my live rock (like cleaner clams only pink, not dull). I've watched them for a few minutes and 3 of them open and close, 3 of them are always shut and 2 are always open. I circled them in these pictures and tried to get as clear of shot as I could.

 

[ivy2dw7]

Zoom of that picture. The 2 circled are 2 of the 3 that open and close and theres one in the middle that is always closed.

 

[bigarn]

Do a search on Stomatella snail and see if you have a match. Pic. #1

 

[ivy2dw7]

Then there are these feather duster looking things on another piece of live rock that I bought cured after my tank had cycled. I noticed them yesterday and I don't see any anywhere else in the tank.

 

[ivy2dw7]

And there is also this other snail-like thing that I found yesterday. I tried taking pictures but you couldn't see it in any of them. It's all white and looks like a snail, but doesn't have a shell or something. I touched it and the back is hard, just like a round thing on top that blends in w/the rest of the snail, like a shield, but not a shell. I have no idea what it is, and I'm sorry I can't provide a picture to help my description but I can't get any picture to come out right with him in it, my camera doesn't like white! But he moves around, unlike the thing stuck to the glass.

 

[ivy2dw7]

OK, I think the first pic and the white snail-like thing might both by stomatella snails. Although they're completely different colors and found them on opposite sides of the tank.

 

[bigarn]

If pic #1 isn't a stomatella snail, the other one you described definitely sounds like one.

 

[ivy2dw7]

What about these other things on the rocks though? Anyone have any idea what they are?

 

[ivy2dw7]

Update: I just looked cosely at the cluster of clam-like things on the rock and one of the ones that was closed earlier opened and the closed again. So these things are alive.. What are they?!

 

[sw_h2o]

I just posted about those things you have in your last pic I found one today! I don't know what it is though. It was fun to watch though.

 

[snipe]

The last one is either aiptasia or a polyp of some kind a closup pic would be better.

 

[romeofoeve]

i have the exact things on my LR, along with christmas tree worms and crabs. the feather duster looking things are actually feather dusters, they come in all sizes and colors. i have a piece of lr with polyps on them and it has over a few hundred of the tiny feather dusters. the other things i think are a type of oyster or something too, i was watching them and they look like mouths and small string like things come out and filter the water. its so fun to get lr and discover animals on them. so far ive gotton a emerald crab, small crab, bubble tip anenome, many x-mas tree worms, hundreds of feather dusters, polyps, corals, worms and the oyster thingies. and i have only bought 4 pieces of lr so far.

 

[romeofoeve]

http://www.reefcorner.com/hitchhikers.htm