Vertebrates are animals with back bones. Invertebrates don't.
mammals are the smallest group of vertebrates
They are qualified as invertebrates and belong to the group of arthropods or crustaceans
Vertebrates and non-vertebrates.
vertebrates
Amphibians
what is the vertabrate group of a walrus
Possums belong to the group of vertebrates known as mammals.Specifically, they are marsupials.
fish
with there lungs.
birds
mammals
Vertebrates have backbones, other animals (besides vertebrates) don't have back bones.