Lizzie Levi
Lizzie Levi answered
The largest mammal is the Blue or Sulfur-bottom whale at 209 tons.
The largest land mammal is the African Bush Elephant at 6.2 tons.
The largest bird is the North African Ostrich at 9 feet tall.

The smallest fish is Paedocypris which is 7.9 mm in length. It is also the smallest vertebrate.