This article has some very interesting information about the complex spawning ritual ( and you thought it was difficult just getting a date for Saturday night); it also talks a bit about how the annual harvesting of 40 million reef fish from the ocean could upset the balance of `things'.
I realize that this thread was started in 2006, but I felt this was an appropriate place to put this post and link.
http://news.nationalgeographic.com/n...darinfish.html