Malenti
Malenti are a bizarre subrace of the Sahuagin, the sharklike "sea devils" that plague many of the worlds of Dungeons & Dragons, which resemble Aquatic Elves rather than the usual vaguely shark-like fishfolk. As a result, they are used as spies and subversives in the ancient feud between these races.
Normally used as monsters, they gained PC stats for Advanced Dungeons & Dragons 2e in Dragon Magazine #250.
Malenti appeared as a background for Eberron player characters in Dungeons & Dragons 5th Edition in the semi-official Exploring Eberron, by setting-creator Keith Baker. In Eberron, Malenti are sahuagin who have been permanently transformed into the shape of a surface-dwelling humanoid and imbued with its memories through powerful fleshcrafting before being dispatched as spies.