Checkered Seagrass Nerite, Smaragdia tragena

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Created 12/6/2025

Family Neritidae

INDO-WEST PACIFIC / HAWAII

Smaragdia tragena


Kahala, Oahu, 10 feet, 3 mm

Kawaihae, Hawaii

CHECKERED SEAGRASS NERITE

A few individuals have been found in Hawaii feeding upon seagrass Halophila on silty sand, along with the native species. It appears to be a recent colonization, likely transferred by boat anchors from other island groups. Attains 0.2 inch, 6 mm. Reunion to French Polynesia, and now Hawaii.