The answer you're looking for is " tadpole." A tadpole is the larval stage of amphibians like frogs and toads, and it eventually undergoes metamorphosis to become an adult. The term "tadpole" rhymes with "bad troll," fitting your criteria perfectly.
Most amphibians grow out of their gills before adulthood.
you just have to troll them.
The first amphibians would look the same as they are today its that they have evolved kinda and its simply the cycle were it starts off as a tad pole and continues to grow until its a adult frog
did you grow up into an adult , I am not the same person who posted the answer on top but they do NOT grow up into an adult furby. Toys cannot grow.
and they grow all in a row.
Crow
crow
Amphibian lay their eggs in water and hatch in water.
Shrink.
yes but a adult tooth cant grow in place of an adult tooth
when they grow adult feathers
Lose a few feet, grow a beard, wear green and yell like a troll.