Alligator gar: a ray-finned euryhaline fish 

source - canva

The gar is the largest species in its family. 

Alligator Gar is the North America's largest freshwater fish. 

The alligator gar's body is torpedo-shaped, usually brown or olive, and fades to a lighter gray or yellow ventral surface. 

Very rarely, they can also be black, as seen in gars that have a high level of melanin. 

The average alligator gar commonly measures 6 ft (1.8 m) in length, and weighs over 100 lb. 

Alligator gar are relatively passive, but they are voracious ambush predators. 

They are nocturnal predators who primarily eat fish. 

In Mainland China, alligator gar is an invasive species that can be purchased as an exotic pet.