Catfish (order Siluriformes) are a diverse group of fish. Notable for their prominent barbels, they are found in freshwater environments of all kinds, with species on every continent except Antarctica. Some species from the families Ariidae and Plotosidae are also found in marine environs. They range in size and behavior from the largest freshwater fish in the world (the European wels, or Silurus glanis), to detritivores (species that eat dead material on the bottom), and even to a tiny parasitic species commonly called the candiru (Vandellia cirrhosa). At present there are 35 catfish families, although this number is in constant flux due to taxonomic work on the order.













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They belong to a superorder called the Ostariophysi, which also includes the Cypriniformes, Characiformes, and Gymnotiformes (although some place Gymnotiformes as a sub-order of Siluriformes).

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Pictures 7 through 10 Are From The USDA





















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