How do goldfish mate?

Ok well we got this new goldfish and put it in the tank with one that has been there a while. (it is old) I dont know if they are boys or girls but the new keeps chasing around the old one even though hes smaller. And sometimes I see it putting its mouth up at the fishes whole. Is it trying to mate? And how do goldfigh mate anyway?

Answer #1

Sounds like it - yes. The male releases the sperm and I think the girl swallows it and impregnates her but I could be wrong.

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