Pseudoplatystoma is a genus of catfish found primarily in the rivers of South America, particularly in the Amazon and Orinoco basins. These fish are known for their large size, with some species growing over 1 meter long. They are characterized by their flattened bodies and distinctive patterns, which help them blend into their riverine environments. These catfish are carnivorous and primarily feed on smaller fish and invertebrates. Pseudoplatystoma species are also popular in the aquarium trade due to their striking appearance. However, they require large tanks and specific care to thrive, making them suitable for experienced aquarists.