Eunoe depressa

Eunoe depressa is a scale worm known from off Alaska in the North Pacific and Arctic Oceans at depths of 35m or less.
Description.
Number of segments 39; elytra 15 pairs. Dorsum with brown transverse bands, especially in first half of body. Anterior margin of prostomium with an acute anterior projection. Lateral antennae inserted ventrally (beneath prostomium and median antenna). Notochaetae distinctly thicker than neurochaetae. Bidentate neurochaetae absent.
Commensalism.
"E. depress" is commensal. Its host taxa are hermit crabs and brachyuran crabs (Crustacea).