Just happened to catch my smaller Starfish upside down and snapped some pix. Never seen them do that before. The other is the larger (3")Starfish who seems to go inside that shell it seems ofter.
He was hanging onto my power head wire with one leg. If you notice below him the return pipe.
He was just poking his feelers out of the water. It was really cool.
I got that and the large one in the shell very tiny. They are just Florida Star and they have lasted through bad parameters, well not that bad but you know how sensitive Stars are. Had them for maybe 7 months.
I even changed salt brands. Never had Stars this hardy. They are decent looking. Got them when they were quarter sized.