Eunice pennata is a species of polychaete worm within the family Eunicidae.

The species has a cosmopolitan distribution, mainly being found in subtropical to polar regions of oceans at depths of 813 to 1064 meters.

[1][2] Areas the species has the most observations include waters around Scandinavia, New England, southern Argentina and Chile, and the South Georgia and the South Sandwich Islands.

[3] Individuals can reach lengths up to 150 millimeters with a width of 8 millimeters.

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