Goldfish are native to eastern Asia, particularly China, but have been widely introduced to ponds, lakes, and slow-moving rivers throughout the world due to the aquarium trade. They are highly adaptable and tolerate a wide range of water conditions, including low oxygen levels and poor water quality. Goldfish are omnivorous, feeding on algae, plant material, insects, small crustaceans, and dead organic matter. They commonly grow to 15–25 cm (6–10 inches), though some wild or feral individuals can exceed 40 cm (16 inches) in length. Goldfish are often caught as bycatch by anglers using small hooks with bait such as worms, corn, or dough while fishing for other species. They can be identified by their deep-bodied shape, lack of barbels (unlike carp), and wide range of colour variations, including orange, gold, white, and black. Source: Fish Base (https://www.fishbase.se/summary/Carassius-auratus.html)