Marine mammals- mammals have a backbone, hair,they bear live young , and they live on land or water.
Fish- have backbones,lay eggs,single pump hearts,have paired fins,have scales, can have bony skeletons,and can have cartilaginous skeletons.
Enchinoderm- don't have a backbone, radially symmetrical (no right or left sides), and their cells seperate into organs.
Cnadaria- don't have backbones, radially symmetrical,have stinging cells that contain poisons,when the "trigger" is touched the poison is discharged, and they trap and paralyze their prey.
Mollusks- don't have backbone.soft unsegmented bodies enclosed in a shell,can have a bivalve, can have univalve,and can have tubular siphon under the head with hands that have suckers.
Crustaceans- exoskeleton (skeleton on the outside),have two paies of antenae, are closely related to the crayfish, and they use their gills.
