What are these animals?

[gabrielt]

There are two animals in my tank that I can't id. The first one came attached to the rock of one of the corals I bought. Its body is calcareous, rounded, white, and it is growing. It emanates what seems to be some transparent sweeper tentacles. Picture below. Of course disregard the flat worms...

The second one is what seems to be a nassarius snail that lost its shell, but I can't be sure.

Thanks in advance,
Gabriel.

 

[tom499]

The top one i think is a type of spagetti worm which is harmless. The bottom one is tritoniopsis sea slug that eats soft coral.

 

[pagojoe]

I believe Tom answered you correctly on the Tritoniopsis. The other one may be a vermetid.

Cheers,



Don

 

[gabrielt]

Thanks for the quick reply. I wonder how I got this Tritoniopsis. I searched on the net for images and I believe the first one is really a vermetid. Should I get rid of them?