The Thunder Drum is a tidal class dragon that appears in How To Pick your Dragon and We Are Family Part 2 and 1.
The Thunder Drum is a tidal class dragon that seems to resemble an Eagle Ray, whale shark, and basking shark all rolled into one. It schools like hammerheads as shown in The Book of Dragons, and has no fire, but instead shoots a super sonic blast that is loud enough to kill a man at close range. The only one that has been trained so far is Thornado, a once rogue Thunderdrum.
- It has gills like a tadpole.
- Even if it is said to have a roar that can kill a man, in How To Pick Your Dragon, Mulch and Bucket survived.