Dolphins are marine mammals that are mentioned in the game, School of Dragons.
Dolphins are mammals fully dependent on a water environment. They roughly resemble Fish, and were historically thought to be a fish. However, dolphins must breathe air from a nostril - called a blow hole - at the top of their heads.
The term "dolphin" is actually a somewhat loose common term applied to smaller to mid-size cetaceans. Porpoises are smaller and generally have shorter beaks, whereas whales are much larger. The one mention of dolphins says "Fishlegs wants to follow a dolphin shoal migration". This term "shoal" is used incorrectly here, as shoaling specifically refers to fish grouping behavior, not marine mammals. A group of dolphins is called a pod.
Dolphins do not really have a function currently in the Franchise.
In actuality, dolphins have been hunted for their meat and blubber throughout history and into the present day. It is possible Vikings may have taken advantage of beached dolphins or herded them into shallow water to butcher if the opportunity presented itself. Presently, dolphins are also kept in public aquariums and zoos for entertainment.
The player can send their non-active dragons on quests - called Stable Quests - for a chance at receiving rewards. One stable quest called "Faster and Slicker", asks the player to send "A fast aquatic dragon" out to study a "dolphin shoal migration" with Fishlegs.
During the Battle for the Edge expansion pack, Astrid mentions dolphins while describing animal behavior.
|“||Cooperative pack behavior is how some animals and mammals survive. Musk Oxen and elephants will circle around their young to form a defensive barrier. Dolphins will travel in shoals to defend the group from shark attacks. If a shark gets too close, two dolphins will split off from the others and attract the shark away from the group.||”|
On Hiccup's interactive map, there is a drawing of a dolphin jumping out of the water.
The Tidal Class dragon, Seashocker was inspired by many sea creatures, including dolphins.
|“||Supremely furtive, Seashockers share attributes with many of the the ocean's most extraordinary creature: the morphology of a Manta Ray, the sonar of a dolphin, and the bioluminescence of a deep dweller.||”|
|Dolphin (Franchise) uses Creative Commons Licensed content from the Dreamworks School of Dragons Wiki page Stable Missions. The list of authors can be found on the page revision history (view authors).|