: Special air sacs under the skin of their face and chest act as cushions, absorbing the shock of the water.
Australasian Gannet breeding habits in New Zealand - Facebook gannet
: Their eyes have structural adaptations that allow them to see clearly underwater almost instantly after they hit the surface. Social Life and "Gannetries" : Special air sacs under the skin of
: They have no external nostrils, which prevents water from being forced into their lungs upon impact. like the Northern Gannet
: Many species, like the Northern Gannet, mate for life.