Treasures from the deep

OK they won't make me rich in spondoolies but always a joy to see them on the beach, wet and shiny after being washed up by the waves. Not many make it unbattered onto this beach because of the reef but the remains are sometimes more interesting than the whole thing might have been.

There's a piece of an Aristotle's Lantern (a type of sea urchin) that breaks up in segments with patterned edges.