Goldfish

Goldfish (Carassius auratus) is a freshwater fish in the family Cyprinidae of the order Cypriniformes. It is commonly kept as a pet in indoor aquariums, and is one of the most popular aquarium fish. Goldfish released into the wild have become an invasive pest in parts of North America and Australia.

Main Photo Credit: "Goldfish (Carassius auratus), British Columbia, Canada" by Christian Louie, 2018. CC BY-NC 2.0.

Description: Wikipedia