This sea dragon has a lot of spunk. The Thunderdrum lets out sonic blasts so loud that it's been known to shatter glass, crack teeth, and can kill a man in close range. It's blast can be heard for miles.
Fun Facts:
- Thunderdrum babies hatch from their shells by making a sky-shattering sonic boom.
- Stoick gets his own Thunderdrum in episode 107 How to Pick Your Dragon and names him Thornado.
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