Did you know there is a frog that is much larger as a tadpole than after it turns into a frog? The tadpole of a paradoxical frog (awesome name, right?) can be 11 inches (27 cm) long, making it the longest tadpole in the world. However, the adult frog's body is only about three inches (7.6 cm) long.
So, why do these massive tadpoles shrink as they become frogs? Basically, it's a result of storing lots of food needed for the energy-intensive process of metamorphosis. The herbivorous tadpole stuffs itself with algae, storing nutrients in its huge tail. Then most of this stored food is used up as the tadpole transforms into an adult frog, reducing the animal's size dramatically. As with most frogs and toads, the tadpoles are herbivores, but the adults are fierce predators.
By the way, there happens to also be a critically-acclaimed jazz band by the name of Paradoxical Frog. Just thought I'd include that totally unrelated and inconsequential tidbit.
Everyone needs a creative outlet. That's why I write.