Vertebrates are only around 3% of all the animals on Earth

Are animals that live in the water. They have gills that allow them to breathe under water

Are animals that have feathers, wings, and lay eggs.

Are warm-blooded animals that nurse their young with milk and have fur or hair.

They start out their lives living in the water with gills just like fish.

Their skin is covered with hard and dry scales.

A cold-blooded animal cannot maintain a constant body temperature.

Is the largest vertebrate that exist.

The only mammals that lay eggs are monotremes such as the platypus and spiny anteater.