I've asked this before, but I didn't have a good picture. My trachyphyllia does this sometimes. It inflates into a ball, but the next morning it's back to normal.
My shrimp and goby were digging behind it yesterday, but I've always read that a trachyphyllia won't inflate if it's irritated, not overinflate. When I took this picture last night, the tentacles were out but it wasn't feeding night.
My shrimp and goby were digging behind it yesterday, but I've always read that a trachyphyllia won't inflate if it's irritated, not overinflate. When I took this picture last night, the tentacles were out but it wasn't feeding night.

