https://en.wikipedia.org/wiki/Goldfish

The goldfish (Carassius auratus) is a freshwater fish in the family Cyprinidae of order ... A natural genetic mutation produced gold (actually yellowish orange) rather than silver colouration. People began to breed the gold variety instead of the ...

https://www.nytimes.com/2016/09/23/science/discarded-goldfish-invasive-species.html

Sep 22, 2016 ... Freed from the constraints of a tank, goldfish balloon to the size of footballs. Within a few generations, they revert to natural yellow and brown ...

http://www.bbc.com/earth/story/20141017-four-secrets-goldfish-are-hiding

Oct 21, 2014 ... Goldfish are a bit "meh", aren't they? They're not as popular a pet as cats or dogs, presumably due to the deplorable lack of cuddles.

https://www.businessinsider.com/why-never-release-pet-goldfish-into-wild-2018-4

Apr 25, 2018 ... Goldfish may look small and cute in your home, but in the wild, it's a different story . Releasing them into your local stream or lake is a bad idea.

http://www.biokids.umich.edu/critters/Carassius_auratus/

The common goldfish has two sets of paired fins - the pectoral fins and pelvic fins, and three single fins- the dorsal, caudal, and anal fin. The head lacks scales.

https://animals.mom.me/goldfish-live-4748.html

Goldfish in nature reside in China, and maybe even in nearby nations such as Japan and Korea. As a result of introduction, goldfish also can even be found in ...

https://nas.er.usgs.gov/queries/factsheet.aspx?SpeciesID=508

In nature, goldfish often hybridize with common carp Cyprinus carpio producing reproductively fertile offspring; cross fertilization and back-crossing is common in  ...

https://www.nature.com/articles/133435a0

MR. ROUGHLEY has written perhaps the best book on gold-fish culture that has yet been published. It is a most useful volume, well produced and full of interest ...

https://www.ducksters.com/animals/goldfish.php

Goldfish are a popular pet. Kids learn about how goldfish live and how to take care of this fish.

https://www.aqueon.com/information/care-sheets/goldfish

Goldfish are ubiquitous in nature and can be found in rivers, streams, lakes, ponds, reservoirs and virtually every freshwater habitat on the planet from temperate ...