Because they have a backbone, no...
This is a mammal and a vertebrate.
A rat is a vertebrate, meaning it has a backbone and an internal skeleton.An animal which is not classed as a vertebrate is known as an invertebrate, rather than a "non-vertebrate".
Vertebrate. All mammals are vertebrates. An invertebrate has no bones. Earthworms, snails, and caterpillars are examples of invertebrates.
invertebrate - has exoskeleton
An invertebrate.
no
It is an invertebrate 
A bullfrog is not an invertebrate; it has a spine.
The octopus is an invertebrate... It has no skeleton.
seriously? wow....... did you pass 4th grade? invertebrate
An invertebrate doesnt have a backbone. A vertebrate has a backbone.
Crabs are invertebrate!Say the yeti crab has no backbone or spine so it is an invertebrate! Not vertebrate.Yes, all crabs are invertebrates, having an external skeleton (exoskeleton).