What is this umbrella?

[Tiger Brown]

Haven't had an USO (Unidentified Sessile Object) since I started this tank. Nothing added lately, just popped out of the live rock right under a piece of mushroom coral. Looks like an umbrella, pretty, but will take out if bad. Any thoughts?

 

[fishguy242]

hi ,are we looking at,green orange disk/plate coral? or is that the mush? can you circle or get closer pic

 

[KJ]

Haven't had an USO (Unidentified Sessile Object) since I started this tank. Nothing added lately, just popped out of the live rock right under a piece of mushroom coral. Looks like an umbrella, pretty, but will take out if bad. Any thoughts?

Mushroom coral.

 

[Tiger Brown]

hi ,are we looking at,green orange disk/plate coral? or is that the mush? can you circle or get closer pic

Yes the green orange disk to the left of part of the mushroom coral.

 

[Tiger Brown]

Another mushroom under the mushroom, huh? Thanks @KJ

 

[KJ]

Another mushroom under the mushroom, huh? Thanks @KJ

YW.

 

[fishguy242]

as kj said mushroom,poke or wait until closed,if has skeleton plate/ disk coral