The Cyprinidae, or carp, are largely represented in southern Asia, and there grow to a size unknown in Europe; a Barbus in the Tigris has been taken of the weight of 300 Th.
They are in fact allied to the carps or Cyprinidae and the cat-fishes or Siluridae.
One member of the Cyprinidae is at present known to be viviparous, but no observations have as yet been made on its habits.
The fish known as loaches (Cobitinae) form a very distinct subfamily of the Cyprinidae, and are even regarded by some authors as constituting a family.
Among Indian fishes, the Cyprinidae or carp family and the Siluridae or cat-fishes are best represented.