(Backbone or Spinal Column)
(No Backbone or Spinal Column)
fish: cold-blooded animals with gills to breath in water
sponges: animals with large pores that live in water
amphibians: cold-blooded animals - such as frogs, toads and salamanders - that begin life with gills to breathe in water, then develop lungs to breathe air
coelenterates: water animals with stinging tentacles, such as jellyfish, man-of-war and coral
reptiles: cold-blooded animals with scales; for example, snakes, lizards, turtles, alligators and crocodiles
flatworms: animals that are flat and not really worms
birds: warm-blooded animals with wings and feathers
nematodes: thread-like animals such as round worms, pinworms, and threadworms found in soil and as parasites in other animals
mammals: warm-blooded animals with hair or fur. They nurse their young.
molluscs: soft-bodied animals often protected by an outer shell, such as snails, oysters, and clams. Squid and octopus are also considered to be molluscs.
annelids: segmented worms such as earthworms and leeches
arthropods: animals with jointed legs and segmented bodies, such as centipedes (two legs per body section), spiders (eight legs and two body parts), insects (six legs and three body parts: head, thorax and abdomen), and crustaceans (such as crabs, lobster, and shrimp). 80% of all animals on Earth are arthropods.
echinoderms: spiny animals, such as starfish, sea urchins, sand dollars, and sea cucumbers
