Home > Invertebrates > Sea Urchins > Heterocentrotus mammillatus

Family Echinometridae

HAWAII

Heterocentrotus mammillatus

Slate Pencil Urchin, Blowhole, 10 feet, 50mm

Blowhole, Oahu, Hawaii, 10 feet

 

Blowhole, Oahu, Hawaii, 25 feet

Palea Point, Oahu, Hawaii, 25 feet

 

Lanai Lookout, Oahu, 35 feet

Kailua Bay, Hawaii, 20 feet

 

Sea Cave, Oahu, 45 feet

 

 

Kapoho tidepool, Hawaii

 

Honokohau, Hawaii, 10 feet

 

Molokini Back Wall, 30 feet

 

Ahihi Bay, Maui, 4 feet

SLATE PENCIL URCHIN

Locally abundant in clear shallow water.  Rare outside the Hawaiian Islands.  Spine shape variable.  Pale brown with light bands at night.  Overall diameter of 10 inches.  Hawaii & the Indo-Pacific.