sea bird, seabird, seafowl - a bird that frequents coastal waters and the open ocean: gulls; pelicans; gannets; cormorants; albatrosses; petrels; etc.

procellariiform seabird - large long-winged bird with hooked bill and tubular nostrils that wanders the open seas

mollymawk, albatross - large web-footed birds of the southern hemisphere having long narrow wings; noted for powerful gliding flight

petrel - relatively small long-winged tube-nosed bird that flies far from land

diving petrel - any of several small diving birds of southern hemisphere seas; somewhat resemble auks