http://www.youtube.com/watch?v=WIWKqYyorVE

This is a video of spawning trout, that Keoni took over the Christmas holidays. It's really cool...at about 2:20 into the film, you see the female laying her eggs and the male spreading his sperm, and then another male fish comes by and the spawning male chases him away, before coming back to finish the job with the female.