A six-armed one. A bit like finding a four-leaved clover :-)
Diving along the north side of Napili Bay, max depth 15 feet.
This healthy 5" Henricia leviuscula leviuscula (Blood Star) was one of about a dozen noticed during the minus tide.
Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea. Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or "basket stars". About 1,500 species of starfish occur on the seabed in all the world's oceans, from the tropics to frigid polar waters. They are found from the intertidal zone down to abyssal depths, 6,000 m (20,000 ft) below the surface.