If you’re an avid boat diver, you’re likely no stranger to lengthy surface intervals, liveaboard vacations, or long trips to and from dive sites. Cultivating an interest in seabirds is a great way pass your time above the water, allowing you to appreciate another aspect of the marine environment. Wherever you are in the world, there are birds to be seen at sea — in estuaries, on the coast, or even many miles from land in the open ocean. Each of these species boasts adaptations that allow them to survive in environments that are often as harsh as they are beautiful. Below are a few of the world’s most easily distinguishable seabird families, presented with the hope that this may spark in the avid divers who read it a new passion for the ocean’s magnificent avian residents.