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  Species: Spinipterus moijiri
  Caption: Close-up of pectoral fin
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  Species: Ancistrus caucanus
  Caption: Close-up of pectoral fin
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  Species: Chaetostoma anale
  Caption: Close-up of pectoral fin
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  Species: Chaetostoma platyrhynchus
  Caption: Close-up of pectoral fin
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  Species: Chaetostoma vagum
  Caption: Close-up of pectoral fin
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  Species: Hypostomus argus
  Caption: Close-up of pectoral fin
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  Species: Hypostomus niceforoi
  Caption: Close-up of pectoral fin
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  Species: Hypostomus oculeus
  Caption: Close-up of pectoral fin
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  Species: Synodontis grandiops
  Caption: Close-up of pectoral fin
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  Species: Synodontis waterloti
  Caption: Close-up of pectoral fin
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  Species: Panaque schaeferi
  Caption: Close-up of pectoral fin area
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  Species: Callichthys callichthys
  Caption: Close-up of pectoral fin ray
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  Species: Acanthicus hystrix
  Caption: Close-up of Pectoral fin. Rio Tocantins, near town of Estreito, Maranhão state, Brazil
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  Species: Pseudolithoxus dumus
  Caption: Female, close-up of pectoral fin
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  Species: Pseudolithoxus kinja
  Caption: L385, Close-up of pectoral fin
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  Species: Pseudolithoxus dumus
  Caption: Male, close-up of pectoral fin