means spiny skin, live on the ocean floor

hatch from eggs, breathe with lungs, cold blooded, dry scaly skin

live in the water, hatch from eggs, breathe through gills, have fins

spend their first half of life in water and second half on land

animals with backbones

animals without backbones

born alive, drink milk from their mothers, have hair or fur

animals known as sponges

has feathers and wings, hatch from eggs

segmented bodies, jointed limbs

segmented worms

hollow sac-like bodies, has tenticles with stinging cells