Feast With Facts on Instagram: "Arapaima is one of the largest freshwater fish in the world, native to the Amazon River basin in South America and first scientifically described in 1822. It has a long, streamlined body with thick armored scales and is well adapted to slow-moving rivers, floodplains, and lakes. Facts • It can grow up to about 3 meters (10 feet) in length and weigh over 200 kg. • Arapaima can breathe air using a modified swim bladder, so it regularly surfaces to gulp air. • It sur