Chordates include mammals, fish, amphibians, reptiles, and birds. Chordates must have a notochord, a dorsal neural tube, Pharyngeal slits, a post anal-tail, and an endostyle. There are more than 75,000 species of Chordates. Both the largest animal and the fastest animal (The blue whale and peregrine falcon, respectively) are Chordates. Humans are also Chordates.