Abstract
Abstract: Albinism has been recorded in Neotropical freshwater fishes, mostly for nocturnal or cryptobiotic species. We report herein a case of albinism in the catfish Cambeva guareiensis (Trichomycteridae) from the Guareí River basin, Upper Paraná River basin, southeastern Brazil. The albino fish was caught with seven individuals with typical color pattern of the species. The features of the albino fish in life and shortly after preservation are described and illustrated.
Highlights
Like several other vertebrate groups, fishes may display different types of physical abnormalities (e.g., Bhagat & Kumar 2014; Catelani et al 2017), among them those related to color such as different types of albinism (e.g., Nobile et al 2016)
A small number of cases of complete albinism is recorded for Neotropical freshwater fishes, mostly in epigeal habitats, albinism is known in hypogeal habitats as well (Carvalho & de Pinna 1986)
Reports of complete albinos among trichomycterid catfishes remain restricted to the cave-dwelling Trichomycterus itacarambiensis Trajano & de Pinna, 1996 (Carvalho & de Pinna 1986; Trajano 1997)
Summary
Like several other vertebrate groups, fishes may display different types of physical abnormalities (e.g., Bhagat & Kumar 2014; Catelani et al 2017), among them those related to color such as different types of albinism (e.g., Nobile et al 2016). A completely albino individual is characterized by pinkish or yellowish color and pink or red eyes (e.g., Sazima & Pombal-Jr. 1986; Oliveira & Foresti 1996; Silva et al 2013). A small number of cases of complete albinism is recorded for Neotropical freshwater fishes, mostly in epigeal habitats (e.g., del Barco & Panattieri 1980; Oliveira & Foresti 1996; Brito & Caramaschi 2005; Silva et al 2013), albinism is known in hypogeal habitats as well (Carvalho & de Pinna 1986).
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