Pleuston: animals which move in water and air.
D000388:Air; D000818:Animals; D001717:Birds / Q000502:physiology*; D004289:Dolphins / Q000502:physiology*; D005399:Fishes / Q000502:physiology*; D008124:Locomotion; D009068:Movement; D013550:Swimming; D014867:Water
D014867:Water