Changes

= Introduction =

= Introduction =

There is great diversity in the reproductive systems of fish.  Some produce eggs and sperm for external fertilization, while others copulate with the discharge of either fertilized eggs or young fish. With regard to physiology, there are several categories which can be used to divide fish into reproductively similar groups as follows:

There is great diversity in the reproductive systems of fish.  Some produce eggs and sperm for external fertilization, while others copulate with the discharge of either fertilized eggs or young fish.

= Male =

= Male =