ID on LR Hitch's

[Murray]

Hi all,

recently in my 40gal invert tank I've noticed quite a few unknown additions.

The tanks been up and running almost a year now and have spotted anthipods / bristle worms etc.

In the last week I have spotted a spagetti worm, copepods and a few other creatures.

1st is very much like aptasia however doesn't have as many tentacles. most tentacles are short and brown with about 5 slightly longer white tentacles tapering to a point at the ends. I can't seem to find a pic anywhere.

2nd is more of a growth - almost like a small flat white shell'd oyster attached to my live rock. The shell is very flat when closed and vertually imposible to see where it opens until it actually does so. It is approx 2cm accross. It only ever opens about 1/4 of an inch and can't really spot whats in it. Any thoughts or ideas anyone?

Thanks

 

[linty]

Sorry...It's sometimes really hard to guess without a picture.

5 long tentacles makes me thing of sea cucumbers or basket stars. Being echidnoderms they tend to have appendages in quintets. Any chance it's something along those lines?

As for the second thing, is there any reason not to think it's a clam? Sounds enough like one to me

 

[Murray]

Thanks for the reply linty,

I'll try and get a pic of the 1st Item, it's ever such a small creature but I'll try get a good shot.

As for the second, it could well be a clam; I initially thought it might be some sort of stationary razor fish. However I got the magnify glass on it today and I can see what appears to be gills on the inside of the shell. The reason I thought it wasn't a clam is because of the unusual shape of the shell (ear shaped).

The tank is actually in my office so on Monday I'll try to remember my digi camera.

Thanks for taking the time to reply!!!

Murray