Are there any fast birds that live in aquatic environments?

Yes, there are a few quick fowls that flourish in oceanic situations. Here are a number of outstanding ones:

Freepik

• Common Eider (Somateria mollissima):
  Known for its noteworthy speed in flight, the Common Eider can reach speeds up to 76.5 mph (123 km/h). They are huge ocean ducks that degree 19.5 to 28 inches in length and have a wingspan of 31–43 inches¹.
• Eurasian Greenish blue (Anas crecca):
  This little duck is one of the speediest winged creatures within the world, able of flying at speeds up to 60 mph (97 km/h). They are found in woodlands, shrublands, and wetlands over different landmasses
• Gentoo Penguin (Pygoscelis papua):
  Whereas not a flying feathered creature, the Gentoo Penguin is an sea-going winged creature known for its swimming speed, coming to up to 22 mph (36 km/h) submerged, making it one of the fastest-swimming fowls

These fowls are adjusted to their oceanic ways of life, with streamlined bodies and capable wings or flippers that empower them to move quickly through the water