id please

[dsgmm9]

i have no idea what this is

its 4 different pieces

 

[joezimm]

Looks like a starburst coral that isn't doing very well.
Also, if it starts to open up more, keep an eye on its tentacles. They flow out in the current several inches (min get up to 4-5") and can sting other coral. I place mine in an area that keeps it out of reach of anything it might bother.
Looks like a pretty nice sized piece.

 

[dsgmm9]

not so sure its a starburst here is a pic of it open

 

[b0b82]

Looks like a sad green Flowerpot coral to me.
Lighting Requirements: Moderate
Water Flow: Moderate
Aggressiveness: Peaceful
Range: Indo-Pacific
Family: Poritidae
Water Conditions: 74-80° F; sg 1.023-1.025; pH 8.1-8.4; dKH 8-12