Can you figure out this coral?

[justincwlee]

I took this photo the day before yesterday.
I think that is kind of a lps skeleton.
It just looks like a shower ball, meshy and 4-5inch wide.

First I thought it could be a pavona or something but it wasn't (too thin and mesh holes)

It was at about 10-15meter(33 to 50ft) deep and the water temperature was 20-22℃( 68-72)°F and the diving master said it was about 16℃(60°F) last week.

Thank you in advance.

 

[reefwiser]

Looks more like a sponge. Where was the image taken?

 

[justincwlee]

Looks more like a sponge. Where was the image taken?

Jeju, s.korea. Does sponge has stone body too? I didn’t know that.