Arapaima

The arapaima is torpedo-shaped with large blackish-green scales and red markings. This is the largest fish found strictly in fresh water, normally reaching up to 7-8 feet long and 200 pounds - with the largest being recorded at 15 feet​

The Arapaima is an obligate air-breather. Unlike most fish that rely solely on gills, arapaimas must surface every 15–20 minutes to gulp air. Their specialized lung-like organ allows them to thrive in oxygen-poor waters of the Amazon, but it also means they would not survive without access to the surface​

The diet of the Arapaima consists of fish, crustaceans and small land animals that near the shore. These fish are fierce predators, sometimes leaping out of the water to grab birds, lizards and even small primates from low-hanging branches​

The arapaima’s scales are so tough they can stop piranha bites—scientists study them for inspiration in making better armor and body protection.​

DATA DEFICIENT (DD):
Insufficient information to perform a full assessment of its risk of extinction.