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 bit meh, aren't they? They're not as popular a pet as cats or dogs, presumably due to the deplorable lack of cuddles. Really they just swim around, opening and closing their mouths, endlessly tormenting your cat with the promise of a tasty snack. That's about it. But there is more to your fishy pet than meets the eye. Here are four things you probably didn't know about goldfish.