2015 Hohonu Moana

The long-spined urchin Aspidodiadema arcitum on a sandy bottom.

The long-spined urchin Aspidodiadema arcitum on a sandy bottom.

The long-spined urchin Aspidodiadema arcitum on a botryoidal...

A pinkish orange long-spined sea urchin.

A pinkish orange long-spined sea urchin - Caenopedina hawaiiensis...

A purple echinothurioid urchin. It walks across the bottom on the...

A purple holothurian on a basalt surface.

Holothurian seen in image expn5615. From a distance, it has a red...