What is "sahuagin"

In the Dungeons & Dragons fantasy role-playing game, the sahuagin are a fish-like monstrous humanoid species that live in oceans, seas, underground lakes, and underwater caves. Sahuagin speak their native tongue ("Sahuagin"). With higher intelligence scores, they can also speak two bonus languages, usually Common and Aquan.

Sahuagin is pronounced sah-HWAH-gin.