GOLDFISH
goldfish, Carassius auratus
(noun) small golden or orange-red freshwater fishes of Eurasia used as pond or aquarium fishes
Source: WordNet® 3.1
Etymology
Noun
goldfish (plural goldfish or goldfishes)
A type of small fish, Carassius auratus, typically orange-colored.
Noun
Goldfish (plural Goldfish)
Short for Goldfish cracker.
Usage notes
“Goldfish” is a registered trademark of Pepperidge Farm.
Source: Wiktionary
Gold"fish`, n. (Zoöl.)
(a) A small domesticated cyprinoid fish (Carassius auratus); -- so
named from its color. It is native of China, and is said to have been
introduced into Europe in 1691. It is often kept as an ornament, in
small ponds or glass globes. Many varieties are known. Called also
golden fish, and golden carp. See Telescope fish, under Telescope.
(b) A California marine fish of an orange or red color; the
garibaldi.
Source: Webster’s Unabridged Dictionary 1913 Edition