Home > Invertebrates > Sea Urchins > Rhynobrissus hemiasteroides

Created 9/26/2013

Family Brissidae

WEST PACIFIC / HAWAII

Rhynobrissus hemiasteroides

 

Puu Kala Point, Kona, Hawaii, 60 feet

 



Dead, Puako, Hawaii, 15 feet

HALF-STAR HEART URCHIN

Uncommon in sand at any depth.  Inflated, lacking dorsal ridge, petals bordered by a pentagonal groove.  Attains at least 2 inches.  Australia to Hawaii and French Polynesia.

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