Barley Grain Trivia, Trivirostra hordacea

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Updated 3/11/2026

Family Triviidae

INDO-WEST PACIFIC / HAWAII

Trivirostra hordacea

Ewa, Oahu, 50 feet, 4 mm
Maro Reef, NWHI

BARLEY GRAIN TRIVIA

Common at any depth under rocks or rubble with compound tunicates or in clumps of Halimeda seaweed. Extremities rounded, dorsal groove shallow, interrupting opposite, sharp-edged ribs. Attains 0.2 inch, 6 mm. South Africa to Japan, Hawaii, and the Tuamotus. Formerly known as Trivia hordacea.