Alligator just floating in the water in the swampy area taken in one of the Florida wetlands. Alligator is a large reptile in the order of Crocodilia in the genus of the Alligator in the family of Alligatoridae. Alligator is the sister taxon to Caimaninae.Scientific classification Domain - Eukaryota, Kingdom - Animalia, Phylum - Chordata, Class - Reptilia, Order - Crocodilia, Family - Alligatoridae, Subfamily – Alligatorinae, Genus - Alligator, Species – Alligator mississippiensis, Clade – Archosauromorpha, Clade - Archosauriformes