Mooneye

Hiodon tergisus is native to the Missouri, Mississippi, and Great Lakes drainages, an active pelagic predator that hunts insects, small fish, and crustaceans in open water. Its closest living relatives are the Osteoglossids, placing it in the ancient superorder Osteoglossomorpha. It requires cool, well-oxygenated water and will not thrive in tropical setups. Active, fast-moving, and easily startled, it benefits from a spacious aquarium with open swimming space and low current turbulence at the surface.