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.
Observe its size. If kept in proper tank or pond conditions, a common goldfish will be around 5 inches (12.7 cm) after a year and 9 inches (22.9 cm) after two years. You can eye your goldfish to see how large it has become. If you keep your goldfish in a small bowl, you may find that its growth is stunted.