Home > Invertebrates > Shells > Tritons > Monoplex nicobaricus

Updated 10/19/2025

Family Cymatiidae

CIRCUMTROPICAL / HAWAII

Monoplex nicobaricus



Kaupo, Oahu, 2 feet


Mokapu, Oahu, 2 feet

Kaunolu Bay tidepool, Lana'i

 

Kaunolu Bay tidepool, Lana'i

Kapoho Point, Kailua, Oahu

 

Makapu'u tidepool, Oahu

NICOBAR TRITON

Common under stones and sand pockets on reefs at any depth.  White with fine brown lines and a brown blotch above the siphonal canal, bright orange aperture, and white columellar folds.  Preys upon other snails including drupes and cowries.  Attains 4 inches, 103 mm.  Hawaii, Indo-Pacific, Galapagos, Tropical Atlantic.  Formerly known as Cymatium nicobaricum.