The Siluridae, or scaleless fishes, and the Cyprinidae, or carp and loach, form the bulk of the mountain fish, :and the genera and species appear to be organized for a mountaintorrent life, being almost all furnished with suckers to enable them to maintain their positions in the rapid streams which they inhabit.
A few Siluridae have been found in Tibet, but the carps constitute the larger part of the species.
Among Indian fishes, the Cyprinidae or carp family and the Siluridae or cat-fishes are best represented.
The Siluridae attain their chief development in tropical regions.
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