Chordates are animals, more specifically deuterostomes; animals that when embryos the first opening they form is thier arsehole. Yukky-ucky! So chordates posses this thingymaboop called a notochord, keeps those (vertabrates) with spine and bravery and responsibiliy stability, at least to not be emptied spined. And cowardly in turn or something like that. All your favorite 4-legged earthmasters are chordates, birds, mammals, hagfish, reptiles, fish, also Oscar Wilde and Breadfish, and things called Tunicates which are used by Space Penguins as badminton balls and fuel.