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 actually very complex creatures. Amazingly, they can reach lengths of 12 or more inches and live 10 to 20 years. The oldest goldfish on record was over 40 years! Goldfish are among the hardiest of fish, and can survive through the worst of conditions. They are perfectly adapted to life in a pond, just like their wild carp ancestors.