The third season of MonsterQuest rolls on tonight with a new episode entitled “Gigantic Killer Fish II.”

Monsters lurk in our lakes and rivers and along our coastlines, waiting to get their jaws into their next victim. The Goliath Grouper is a monster fish that inhabits the tropical shallow waters of Florida and the Caribbean. In 1895, the New York Times reported on a monster grouper that measured in at over 1,500 pounds. This super-sized fish is making a comeback, growing to immense proportions with the aggression to match. A recent victim was attacked while spear fishing and describes having the Goliath grouper wrap its vicious jaws around his head. Meanwhile, in Minnesota, a resurgence of a monster no less aggressive is on the rise: the Muskie. Also known as the muskellunge, this monster fish has frightening teeth that draw blood from a growing list of victims. Now, our team launches expeditions beneath the waters of Florida and sends ROVs under the ice of Minnesota to find out how large and how aggressive these creatures can get.

Please remember that MonsterQuest airs on Wednesday nights at 9pm EST on History Channel.