Kuo-toa

Kuo-toa are a debased monstrous humanoid fish-like race that dwell in the Underdark. They have human-like bodies and fish-like heads.

Society
Kuo-toans maintain friendly relations with drow, their Underdark neighbours

Kuo-toa often raid seaside settlements for human victims. Most worship the goddess Blibdoolpoolp, though a few remote tribes worship Dagon. Blibdoolpoolp is the focus of the kuo-toans' lives, and even has her own monstrous, deformed kuo-toa breed - the giant kuo-toa leviathan.