A new species of rivulid killifish has been discovered in the waters of Surinam, South America.
Frans Vermeulen and Tomas Hrbek described the new species as Kryptolebias sepia in a paper in the journal Zootaxa this month.
The new fish was discovered in from small forest tributary streams of the Trapanahony and Palumeu rivers which form part of southeast Surinam's upper Marowijne River.
Vermeulen and Hrbek say that Krytolebias sepia can be told apart from other members of the Kryptolebias genus, and from Rivulus species, by its strong melanin pattern, strong sexual dimorphism and its ability to rapidly change colour.
The authors also state that the juvenile and adult colours of this new species are strikingly different from each other.
For more details see the paper: Vermeulen, FBM and T. Hrbek (2005) - Kryptolebias sepia n. sp. (Actinopterygii: Cyprinodontiformes: Rivulidae), a new killifish from the Tapanahony River drainage in southeast Surinam. Zootaxa: 928: 1-20.