Gambusia Control Homepage - The effect of Gambusia introduction on native aquatic fauna. Animal Library: Fish: Mollies - An article on the keeping of mollies in environments ranging from marine to freshwater. Molly - Basic information on this fish. Description: Sailfin Molly - A biological profile of the Poecilia latipinna. Molly Profile - Descriptions of the three common types of mollies. FishLore: Livebearer Fish Species - Provides photos and profiles on the molly, guppy, platy and swordtail. Livebearers - Articles on fish keeping, species list, and gallery.