Home > Invertebrates > Sea Urchins > Echinothrix calamaris

Updated 12/18/2013

Family Diadematidae


Echinothrix calamaris

Blowhole, Oahu, 25 feet


Palea Point, Oahu, 40 feet

Sharks Cove, Oahu, 25 feet


Blowhole, Oahu, 20 feet

Lanai Lookout, Oahu, 30 feet

Kewalo, Oahu, 40 feet


Kewalo, Oahu, 40 feet


Sea Tiger Wreck, Oahu, 95 feet

YO-257 Wreck, Waikiki, Oahu, 85 feet

Puako, Hawaii, 35 feet


Honokohau, Hawaii, 30 feet


Kewalo, Oahu, 50 feet


Fecal pellets, Haleiwa Trench, Oahu

Juvenile, Kewalo, Oahu, Hawaii, 25 feet


Magic Island, Oahu, 25 feet

Magic Island, Oahu, 25 feet


Common on reefs and rubble away from the surf zone.  Closely spaced primary spines black in adults, banded with white in juveniles, narrow venomous secondary spines entirely yellow-brown.  Test diameter and spine length attain 4 inches.  Gonads are a local delicacy.  Anal opening may host the commensal crab, Echinoecus pentagonus.  Hawaii & the Indo-Pacific.