How do you get hideous zippleback?

Answer 1

A zippleback eats fish go to the cave where the gronckle is before going inside pass it to where a series of arches are and go inside in a closed off area where you cannot fly you find the place to go to get it

Answer 2

hideous zippleback is a two headed dragon from the film 'how to train your dragon'

Answer 3

First, feed it, then play a lot with it then it becomes your friend forever.