–noun, plural (especially collectively) -fish, (especially referring to two or more kinds or species) -fish⋅es.
1.
a small, usually yellow or orange fish, Carassius auratus, of the carp family, native to China, bred in many varieties and often kept in fishbowls and pools.
gold·fish (gōld'fĭsh') n.
pl.goldfish or gold·fish·es A freshwater fish (Carassius auratus) native to eastern Asia, usually having brassy or reddish coloring and bred in many ornamental forms as an aquarium fish.
[gohld-fish] 
) -fish, (especially referring to two or more kinds or species