What kind of animals are crabs and lobster?

This means they belong to the same class of animals, which also includes:

* Shrimp

* Crayfish

* Barnacles

* Krill

Crustaceans are characterized by having:

* A hard exoskeleton (outer shell)

* Jointed appendages (legs and antennae)

* A segmented body (divided into sections)

* Gills for breathing underwater

While crabs and lobsters share these characteristics, they also have some distinct differences in their appearance and behavior.