Coral is mentioned briefly in the How to Train Your Dragon Book series.
Coral is a collective term for simple polyp marine animals that may live individually or in colonies, and which grown a protective calcium carbonate shell. Colonies can form vast underwater structures and create a complex habitat and ecosystem for other organisms.
Most coral lives in temperate and tropical ocean waters, but some - called 'Cold-water' or 'Deep-water' coral - live in lightless deeper and colder waters. They can occur in the North Atlantic and North Sea along the British Isles and Scandinavia. The most common cold-water coral is Lophelia pertusa. This species can form reefs. Generally Lophelia pertusa is white, but can also range to reddish-orange. These reefs are home to a large number of other animal species, including many economically important fish.
Coral does not have a use in the Book series, but appears as a background organism of the sea.
The Green Death's Supper Song after his death is described using coral:
|“||He was listening to a strange sound that seemed to be coming from the flaming tooth itself. It was the sound of wheezy, echoing singing, like the wind blowing through coral caves ...||”|
|— Book 1|
|“||... and I see in my mind's eye a shield, strangely changed by a rich encrusting of jewel-like barnacles and cold-water coral, with an eight foot tooth sticking right out of the middle of it.||”|
|— Book 1|
- Reefs of the Deep: The Biology and Geology of Cold-Water Coral Ecosystems. J. Murray Roberts, Andrew J. Wheeler, André Freiwald. Science. (Retrieved: November 11, 2017)