Eunoe laetmogonensis is a scale worm known from the north-east Atlantic Ocean at depths of about 800 to 2300 m.Kirkegaard, J.B. & Billet, D. (1980) Eunoë laetmogonensis: A New Species of Polynoid Worm, Commensal with the Bathyal Holothurian Laetmogone violacea, in the North-East Atlantic. Steenstrupia 6, 101–109.
Description Number of segments 37; elytra 15 pairs. Dorsal surface deep blue (becomes dark brown in alcohol). Prostomium anterior margin comprising a pair of acute anterior projections. Lateral antennae inserted ventrally (beneath prostomium and median antenna). Notochaetae about as thick as neurochaetae. Bidentate neurochaetae absent.
Commensalism E. laetmogonensis is commensal; its host taxon is the sea cucumber, Laetmogone violacea.
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