https://patreon.com/freeschool - Help support more content like this! Animals are classified into different groups based on their characteristics. Invertebrates are animals that do not have a spine, or backbone. Vertebrates are animals that do! Vertebrates are further classified into fish, amphibians, reptiles, birds, and mammals. Come and learn what makes animals a part of these groups in this fun, kid-friendly video! Like this video if you want to see more videos about ANIMALS! Subscribe to FreeSchool: https://www.youtube.com/user/watchfreeschool?sub_confirmation=1 Visit us on Facebook: https://www.facebook.com/watchFreeSchool Check our our companion channel, FreeSchool Mom! https://www.youtube.com/channel/UCTcEtHRQhqiCZIIb77LyDmA And our NEW channel for little ones, FreeSchool Early Birds! https://www.youtube.com/channel/UC3OV62x86XHwaqsxLsuy8dA "Jaunty Gumption," "Rocket Power," "Disco Medusae," "Electrodoodle," by Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 License http://creativecommons.org/licenses/by/3.0/ Video Credits: U.S. Fish & Wildlife Service, National Conservation Training Center, Creative Imagery Tadpoles 2 by Fritz Flohr Reynolds Nile Crocodile Swallowing the Head of a Big Tilapia by Bernard Dupont Baby Turtles Digging Out of Their Nest by Tyler Karaszewski Brown frog resting on rock near violet flowers - Hori Varlan