NEET BIOLOGY

Detailed explanation-1: -goldfish, (Carassius auratus), ornamental aquarium and pond fish of the carp family (Cyprinidae) native to East Asia but introduced into many other areas. The goldfish resembles the carp (Cyprinus carpio) but differs from its relative in having no mouth barbels.

Detailed explanation-2: -Sharks, rays, skates, and chimaeras (also know as rat fishes) all have cartilaginous skeletons. Cartilage is less dense than bone, allowing sharks to move quickly through the water without using too much energy.

Detailed explanation-3: -A History of the Goldfish Once breeding began, a color mutation appeared, resulting in yellow-orange scales. Yellow was designated the imperial color and forbidden to be kept by anyone other than members of the royal family. Commoners had to stick to the orange version, calling them goldfish.

Detailed explanation-4: -Hillstream Loach Best of all, they enjoy cooler temperatures just like goldfish do. This category of fish includes the reticulated hillstream loach, Borneo sucker loach, Chinese butterfly loach, and many other flat-bodied loaches.