The Walking Goldfish

Being told that flying isn't possible sucks, but for one particular fish, nope.

"Don't go to earth, you'll become a human"." Is what the fish has been told Every. Single. Day.

So, having enough of all the lecture, the now free goldfish goes onto discover life as a highschool student, who has now been completely transformed into a human.

How? why? that's what the fish has always wanted to know.