whats this?

[tcglsu]

got my rock in the tank sat. noticed this little thing looks like a flower can someone tell me what it is? its a lil blurry about the size of the tip of your thumb

 

[tcglsu]

nobody knows

 

[Kurt_Nelson]

Not with that picture. Any chance of a better one, more in focus? Could be a sponge. Could be a coral.

 

[Etunes]

I vote sponge or coral (leaning more towards sponge) but kurts right.

 

[mr_X]

looks like a dead piece of coral to me.

 

[tcglsu]

thanks for the id this pic might help a little better

 

[pat8you]

Going to go with Mr x on this one. Looks like a deal coral skeleton.

 

[tcglsu]

should it remove it or its ok

 

[Crepe]

It's alright to let it stay there.

 

[mr_X]

it's fine there. it's just a piece of live rock now.

 

[ryshark]

It looks like it is or was a favia or favite, type of lps coral to me. Click here Saltwater Aquarium Corals for Marine Reef Aquariums: Brain Coral, Favites
Is it hard?

Or do you have kids... maybe they threw this in:
http://farm2.static.flickr.com/1069/666647925_2d9ccff560.jpg