Chordates
Chordates are a phylum of animals that include more than 60,000 living species. Chordates include mammals, fish, amphibians, reptiles, and birds. The world's largest animal is included in this phylum: the blue whale. The world's fastest animal is also in this phylum: the peregrine falcon. Chordates reproduce sexually. Chordates are found on every continent on earth and all of the earth's oceans and seas.