Piriá

The julii cory, Hoplisoma julii, long known as Corydoras julii, is an armoured catfish from coastal river systems south of the Amazon delta in northeastern Brazil. Also known as 'leopard cory' or 'three-lined cory', it is often confused with H. trilineatum from the upper Amazon, and many fish traded as C. julii are that species. H. julii has numerous small, distinct spots on the head, where H. trilineatum has vermiform markings, though some H. trilineatum are spotted too.

Metynnis lippincottianus is a spotted silver dollar from Brazil and French Guiana, found in the lower and middle Amazon and the Oyapock system. It is occasionally seen for sale, sometimes as 'silver dollar', and its spotted pattern tells it apart from M. argenteus and M. hypsauchen. The spots are less pronounced than in M. maculatus, with which it shares a common name. The precise extent of its range is unclear.