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By: Sazima, Ivan - Carvalho, Lucélia Nobre - Mendonça, Fernando Pereira - Zuanon, JansenType: ArticleIn: Neotropical IchthyologyVolume:Series:Issue:Date: 2006-03-01Page Range:Publication Info:Subjects: Crypsis defence against predators Gymnotiformes leaf resemblance Siluriformes