classification about fish

                               Fish

1. Fish live in water
2. Fish are cold blooded
3. Fish have backbone
4. Fish mainly breathe thru by their gills
5. almost all fish have fins which they use for  swimming.
6. Fish lay eggs
7. Fish have air bladder
8. Fish have scales 
9. Fish have kidney
10. Fish have guts
11. Fish have two charbeard heart 
12. Fish have intestine
13. Fish have head kidney

classification about animals

            Mammals

1. Mammals are warm blooded
2. Mammals sweat when they are hot
3. Mammals have three small bone in their ear
4. Mammals have backbone
5. Mammals give birth to young one
6. Mammals have 4 limbs
7. Mammals have posses one jaw bone
8. Mammals can eat plant meat or both
9. Mammals make milk for their baby's
10. Mother Mammals feed their baby with their milk
11. Mammals live on land
12. Mammals breathe using their lungs