Hypopygus Varii
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Hypopygus Varii
''Hypopygus'' is a genus of South American Gymnotiformes, gymnotiform knifefishes native to the Amazon basin, Amazon, Orinoco and upper Paraguay River, Paraguay basins, as well as rivers in the Guianas. They are often common, and found near submerged roots, aquatic vegetation and leaf-litter in streams, edges of rivers and floodplains. They are regularly found among vegetation in floating meadows, a habitat that often contains little oxygen, but they are well-adapted to this. They are well-camouflaged and brown in color with a banded/mottled pattern. They generally resemble the related ''Steatogenys'', but are smaller, reaching up to in total length depending on the exact species of ''Hypopygus''. The smallest is ''H. hoedemani'', which is the second-smallest knifefish, after ''Microsternarchus brevis''. They are nocturnal and feed on small invertebrates. During the day they remain hidden, often in groups that may number several dozen individuals. Taxonomy and species ''Hypopygu ...
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