Class Chondrichthyes

This class of Chordata are made up of fishes. This includes true fishes, manta rays, sharks, and eels. Fishes shares many commons features which are:
 * They live in water.
 * Fish have a backbone, so they are vertebrates.
 * Fish breathe using gills. They absorb oxygen through the gills.
 * Almost all fish are cold-blooded.
 * Some fish have scales.Green-Clown-Fish-Wallpaper-12-For-Desktop-Background.jpg