Scooby-Doo! Mystery Incorporated Season 1 Episode 20
Overview
Feeling left out of the group, Velma goes solo to investigate attacks by amphibious “Fish Freaks” in the area around an abandoned oil rig, only to find a friend of her own… in the form of a mermaid!
Director: Lauren Montgomery
Guest Star: Carlos Alazraqui, Daran Norris, Frances Conroy, Gary Anthony Williams, John O'Hurley, Tia Carrere, Vivica A. Fox