New rock split in half

[rade8em]

Went out and bought a cool Frag rock that had mushrooms, polyps, featherdusters, and a sponge attached to it. Acclimated it got it in the tank and went to eat dinner. When I went back to see it the rock had split in half (How Cool) What I think I have is a Oyster!!

I know that they eat Phytoplankton do they need any extra care?
And I cant believe that the LFS sold it to me as a frag rock..

I have attached a photo

http://reefcentral.com/gallery/data...split_rock2.jpg:dance:

 

[RokleM]

Link fix for you...

 

[Tennyson]

I have the same thing on my goniopora though not as big. My goni is an encrusting species. They're pretty cool and interesting to watch.

 

[rob1991]

could you get a clearer pic of it, cant really make heads or tails of the pic as of now.... would be really cool if it was an oyster though!