Lythrypnus is a genus of gobies native to the Atlantic and Pacific coasts of the Americas including Cocos Island and the Galapagos Islands.

Lythrypnus is a hermaphroditic fish that is able to change sex.

Depending on its size and shape, Lythrypnus Dalli is able to have both male and female reproductive function.

There are currently 20 recognized species in this genus:[1] [1] This Gobiidae-related article is a stub.

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