The three types of symbiosis are... Mutualism: A relationship in which both species benefit. Commensalism: A relationship in which one species benefits and the other speci â¦ es is neither helped nor harmed.
Definition of goldfish. : a small usually golden-orange Asian cyprinid fish (Carassius auratus) often kept as an aquarium and pond fish.
Goldfish are a specially-bred ornamental variety of carp and thus would eat naturally-occurring carp food in the wild, such as insects, tadpoles and so forth. Fairground goldfish can live for years and grow to astounding proportions, and like all carp can learn to feed from a human hand. (Watch out for the teeth.) They can also be released into the wild and will happily interbreed with local carp, losing their conspicuous colouring after a few generations.