Fish WHAT IS AN ANIMAL Ted O'Hare Britannica Digital Learning
Fish Fish are vertebrates This means they have backbones Amphibians reptiles birds and mammals are vertebrates too Fish differ in many ways from the other groups Fish have fins they live in water and they usually have scales Almost all species of fish breathe through gills instead of lungs Fish are cold-blooded as are reptiles and amphibians This means their body temperature is close to that of the water around them 4 Shape fins and scales help identify fish
