Jordan & Bollman, 1890) Xenocys jessiae, the black-striped salema, is a species of marine ray-finned fish, a grunt belonging to the family Haemulidae.

[3] The head is conical in shape and has large eyes and a short diagonal mouth with a protruding lower jaw.

The dorsal fin is not continuous, the anterior spiny portion is completely divided from the posterior soft- rayed part.

[4] Xenocys jessiae is found in the eastern Pacific Ocean where it is endemic to the waters around the Galápagos Islands.

[5] Xenocys jessiae was first formally described in 1890 by the American ichthyologists David Starr Jordan (1851-1931) and Charles Harvey Bollman (1868-1889) with the type locality given as Isla Santa Maria in the Galápagos Islands of Ecuador.