The arapaima is the largest fish in the Amazon River basin. These incredible freshwater fish can measure 10 feet (3 meters) long and weigh more than 400 pounds (180 kilograms).

Measuring 10 feet (3 meters) long and weighing in at more than 400 pounds (180 kilograms), it's hard to imagine that the arapaima, the largest fish in the Amazon River basin, could ever go missing.

The arapaima is one of the largest freshwater fish in the world. Though the specimen found in Florida’s Caloosahatchee River was only about 5.5 feet long, arapaima can be much larger.