Diadematoida Duncan 1889

Banded Sea Urchin, Echinothrix calamaris

Banded Sea Urchin, Echinothrix calamaris

Banded Sea Urchin, Echinothrix calamaris

Banded Sea Urchin, Echinothrix calamaris

Astropyga magnifica, lateral viewAstropyga magnifica, collected off Aguadilla, Crashboat Basin, Puerto Rico, Caribbean Sea, from a depth of 30 m.

Astropyga magnifica, oral viewAstropyga magnifica, collected off Aguadilla, Crashboat Basin, Puerto Rico, Caribbean Sea, from a depth of 30 m.

Astropyga magnifica, aboral viewAstropyga magnifica, collected off Aguadilla, Crashboat Basin, Puerto Rico, Caribbean Sea, from a depth of 30 m.

Diadema antillarum Diadema antillarum (pre-mass mortality)

Diadema antillarum, aboral view Diadema antillarum, aboral view showing iridophores, Galeta, Panama, Caribbean.

Diadema mexicanum, aboral viewDiadema mexicanum, aboral view showing pattern of iridophores, Tabogia, Panama, eastern Pacific.

Astropyga pulvinataAstropyga pulvinata, photographed off La Libertad, Ecuador, eastern Pacific.

Astropyga pulvinata, oral viewAstropyga pulvinata, collected off Taboga Island, Panama Bay, Panama, eastern Pacific, from a depth of 10 m.

Astropyga pulvinata, aboral viewAstropyga pulvinata, collected off Taboga Island, Panama Bay, Panama, eastern Pacific, from a depth of 10 m.