(Mimagoniates microlepis)
Mimagoniates microlepis, also known as the blue tetra (a common name shared with Tyttocharax madeirae, Knodus borki, and possibly other Characidae, as well), the croaking tetra (a name also applied to Mimagoniates inequalis and Mimagoniates lateralis), the small-scaled tetra, is a species of tetra in the genus Mimagoniates. First identified by Franz Steindachner in 1876 and named Coelurichthys microlepis, it has also been identified as Coelurichthys iporangae (Miranda-Ribeiro, 1908), Coelurichthys lateralis, and Mimagoniates iporangae (McAllister, 1990) besides its current taxonomic classification. There is evidence of a variety called M. microlepis 'Joinville' which might be synonymous with Paragoniates microlepis.