Frogs call their young tadpolls.
young trout
A chick
infant
Alligators cannot speak, but humans call young alligators "hatchlings".
Young elephant.
A Brainaic
a polymath
he answers a call of nature
No Usher does not call Justin Bieber young phenomenal.
An answerer, in this case, you can call him by his username, Ironnica
Young fish are called fry.