Ranchu Kirin Gold Fish

The goldfish (Carassius auratus) is a freshwater fish in the family Cyprinidae of order Cypriniformes. It is commonly kept as a pet in indoor aquariums, and is one of the most popular aquarium fish.

If released into the wild, goldfish can group up into what’s called a school. But they don’t need companions to be happy in captivity and are fine if kept separately in a tank.

Because they’re not an aggressive species, they can be paired in a tank with fish that aren’t vastly different in size. They’re also smarter than may meet the eye.

In captivity, goldfish usually eat pellet or flake food. Supplements, however, are recommended to better mimic their natural diet. In nature, they eat worms, larvae, small crustaceans like brine shrimp, and even salad fixings like peas and lettuce. It’s recommended that goldfish owners add greenery to the bowl since the fish like eating live plants.