Organization of the Animal Kingdom What is an Animal? Active multicellular organism that eats primary producers or other consumers All animals: Find food Avoid predators Reproduce Lead to unique adaptations Every behavior has a purpose Major Phyla Protozoa Single-celled Individual or in colonies Aquatic Many are marine plankton Reflects lifestyle, not taxonomy Float with currents Parasitic Some cause illness in a host Major Phyla Phylum Porifera Sponges Multicellular Marine Major Phyla Phylum Coelenterata (sill-enter-ah-tah) Jellyfish, anemones, coral Mostly marine Solitary or colonial Colorful Show major evolutionary advancements Major Phyla Phylum Platyhelminthes (platy-hel-min-thez) Aquatic and terrestrial Flatworms Some are parasitic Up to 40 meters Major Phyla Phylum Aschelminthes (ask-hell-min-thez) Aquatic and terrestrial Round and unsegmented worms Some are parasitic African Eye Worm Spread by a fly Major Phyla Phylum Annelida Segmented worms Aquatic and terrestrial Microscopic to 3 meters Show major evolutionary advancements Major Phyla Phyla Arthropoda More species than all other phyla combined All environments Insects, crabs, lobsters, crayfish, shrimp Major Phyla Phylum Mollusca Commonly marine Soft body in a shell (usually) Snails, clam, squid, octopus Major Phyla Phylum Echinodermata Marine Spiny and brittle Spiny Skin Sea stars, sea urchins, sand dollars Major Phyla Phylum Chordata Have backbones and endoskeletons All vertebrates Fish, mammals, birds, etc. Most complex