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Description
Gymnodoris (W. Stimpson, 1855) is an accepted nudibranch genus in the family Polyceridae, found throughout the Indo-West Pacific. They are active predators that chase and eat other nudibranchs and sacoglossans (sometimes their own kind), and at least one species parasitizes goby fish. A 2022 phylogenetic study revealed considerably more species than previously recognized, and dozens of species are now described.
Identification
The mantle is reduced, so the body looks almost naked. The gills are arranged in a ring or in a line along the back, and this difference does not mark natural groups. The base colour is translucent white or cream with red, orange or yellow markings, and the gonad is visible separately from the digestive gland.
Species in this genus (2)
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