Carabian Sea, Dominican Republic, Cuba, Haiti, Venezuela, etc
Trichius rosaceus was created in 1769.
Oxycanus rosaceus was created in 1935.
A cake urchin is any of a variety of echinoderms of the genus Clypeaster.
Genus and species is Clypeaster subdepressus
Quite common in cliffs just below Williams Parade Bairnsdale in layers exposed by river erosion. - thewhitefly