The Arapaima gigas is a large freshwater fish native to the Amazon River basin in South America. It can grow up to 15 feet long and weigh over 440 pounds, making it one of the largest fish in the world. This species is known for its distinctive appearance, featuring a long, streamlined body and a large, bony head. Arapaima gigas is a carnivorous fish that primarily feeds on smaller fish and invertebrates. It has a unique respiratory system that allows it to breathe air, which is essential for survival in oxygen-poor waters. Due to overfishing and habitat loss, this species is currently listed as vulnerable by the IUCN.