Wallagonia

The striped wallago catfish, Wallago leerii, is a large predatory catfish from southeast Asia, including the Mekong basin, that can reach 2 metres. Like all Wallago it has an enormous mouth full of backward pointing teeth, and smaller fish are simply swallowed whole. This is NOT an aquarium fish, though it is imported quite regularly at a small size. In nature it is migratory and moves into inundated forest during the rainy season.