Metridiidae Sars, 1902, non Carlgren, 1893 Metridinidae is a family of copepods, comprising three genera – Gaussia, Metridia and Pleuromamma.

[1] It has also been referred to as "Metridiidae", but following a petition to the International Commission on Zoological Nomenclature, that name has been restricted to the family Metridiidae Carlgren, 1893, based on the anthozoan genus Metridium.

[2] All species in the family can produce blue-green bioluminescence; the light is produced in glands, whose position varies between genera.

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