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.
This is the first of two main categories of goldfish. As their name suggests, these goldfish only have one single caudal and anal fin. Their tail fin is forked, making these breeds accomplished sprinters through the water. The sleek bodied variants closely resemble their wild carp ancestors.