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.