Dolphins live in pods and travel graciously and tuned to each other and are therefore also chosen to illustrate teamwork or synchronisation.
Copywriters are going out of their way to link a product to this smart animal. It is a slippery path, though, as sometimes the attributions are less than convincing.
The author tries to add some weight to the advert in giving the scientific name of the animal : The Dolphin. (L. Tursiops Truncatus). That is the equivalent to stating The Fish, because there are many species of each and fish or dolphin are the name of the collection of all species in the group. Notice also the beginner's mistake in the scientific notation. It should have been Tursiops truncatus L. meaning the Bottlenose Dolphin.
The same idea of freedom and freedom of movement is also present in the advertisements of two other airlines (Nos. 15, 16) which talk about their intercontinental flights. And we recognize the idea also in the car advert of No. 17 where it comes with a touch of joie de vivre. It is a bit strange and certainly surprising that airline companies fall back to an animal living in an environment they rather wish to avoid.
Dolphins are also used for another medicin, now against constipation (Nos. 19, 20), but I am clueless about the reason. The same holds true for the television screens which won't strain your eyes (21, 22), for the printing blankets (24) and for the user centered computing (23).
† Evolution is not working in cycles. Evolution knows only forward in whatever direction this may be, without a specific target.