Black glass like ball

[thommyboy12183]

I do t think this is bubble algae as it slowly moves on the live rock any ideas? Ive googled but all i get is bubble algae?

 

[Reef_Chief]

Ive had a snail lose its shell and looked very similar. Try doing a head count and if one is missing or you find an empty shell then most likely will be a snail.

I did some reading about it when it happened to me a while back. It can several different things but if i remember correctly its not something theycan choose to do, usually a parasite or something to do with the muscle they use to attach themselves deteriating.

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[thommyboy12183]

I have lost alot of snails over time so hard to tell asvi leave empty shells in tank. That being said it is almost abperfect circular fogure with a very small nipple like protrusion.

 

[CrayolaViolence]

Looks like a sponge or tunicate.

 

[homer1475]

Looks like a sponge or tunicate.

I was originally thinking the same thing, but the more I look at it, there is no central hole(vent, oral disk, what have you) like a sponge or the 2 vents a tunicate has.

Im not sure TBH.

 

[thommyboy12183]

There is a small what i called a nipple like thing(maybe vent) cant get a good picture if it is tunicate. Are they harmful?a t

 

[Sk8r]

No, just kind of neat. Won't live long in our tanks.

 

[thommyboy12183]

Alright i will keep an eye on it to see how it evolves.