[Cougra]

It's the release of these hormones is the origins of the saying "Fish will only grow to the size of their environment". This semi-myth started back before chemical filtration and the impoortance of water changes was completely understood and people noticed that their freshwater fish didn't grow nearly as large or as quickly as the ones in the wild do. After a lot of research into why this was occuring it was found the fish released growth inhibiting hormones along with other types of hormones. It's believed that this is done to ensure that a lake, pond or pool of water didn't become over populated and deplete the food source. I'm not 100% certain that saltwaterfish release similar types of hormones but until someone can conclusively say this isn't the case then I'm not taking any changes with it.