What is "hypoplectrus nigricans"

Negrita \Ne*gri"ta\, n. [Sp., blackish, fem. of negrito, dim. of negro black.] (Zo["o]l.) A blackish fish ( Hypoplectrus nigricans), of the Sea-bass family. It is a native of the West Indies and Florida.

Hypoplectrus nigricans, the black hamlet, is a hamlet in the family Serranidae. It is native to shallow parts of the central Western Atlantic Ocean and Caribbean Sea. It grows to about in total length. It is a simultaneous hermaphrodite, with a breeding strategy known as egg trading. One fish acts as a female and lays a batch of eggs which the other fertilises. The following night, the roles are reversed.