How do fish mate with other fish?
But in a nutshell, in some species, the male fish inseminates the female fish who then grows the fry inside her body, other fish lay eggs, which are then fertilized by the male outside of the female’s body, and there are a few hermaphrodites self-fertilize, without the need for mating at all.
Do fish mate by themselves?
Summary: Female fish can breed a new species if they aren’t choosy about who is Mr. Right. Fish will mate with a species outside their own if the male’s coloring is attractive enough or if the female can’t see him properly, according to new research.
How do fishes release sperm?
In bony fishes a sperm duct leads from each testis to a urogenital opening behind the vent or anus. In sharks and rays and in cyclostomes the duct leads to a cloaca. Sometimes the pelvic fins are modified to help transmit the milt to the eggs at the female’s vent or on the substrate where the female has placed them.