The Muskellunge (Esox masquinongy), often called "Muskie," is the largest member of the pike family in North America. These fish can grow over 4 feet long and weigh up to 70 p... The Muskellunge (Esox masquinongy), often called "Muskie," is the largest member of the pike family in North America. These fish can grow over 4 feet long and weigh up to 70 pounds. Muskies have elongated bodies, flat heads, and sharp teeth. They are apex predators in their freshwater habitats, hunting fish, frogs, and occasionally birds. Muskies are highly sought after by sport fishermen for their elusive nature and powerful fight.Click here to read more about Muskie.