Pelagic
Cruising open ocean water columns far from coasts and reefs, built for constant forward swimming.
Atlantic Bluefin Tuna
A tuna up to 13 feet long that dives past 1,000 meters and keeps a warm body.
Calanus Copepod
A small North Atlantic copepod whose oil sac fuels a winter sleep in deep water.
Cookiecutter Shark
A shark up to 56 cm long that glows underneath to lure big animals close, then spins to cut a round plug out of them.
European Storm Petrel
The Atlantic's smallest seabird, weighing about 25 grams but migrating from the north-east Atlantic to winter off southern Africa.
Mahi-Mahi
A gold-and-blue ocean sprinter that can pass 4 feet long in its first year.
Megamouth Shark
A filter-feeding shark first known from 1976, when one got tangled in a research ship's parachute anchor.
Ocean Sunfish (Mola Mola)
Up to 1.3 tonnes of cartilage-and-jelly fish with no tail fin. It dives for siphonophores, then floats flat at the surface between dives.
Shortfin Mako Shark
Considered the fastest shark in the world: burst speeds up to 70 km/h, warm swimming muscle, and hook-like, razor-edged teeth.
Swordfish
A fish with a heater for its brain and a flattened bill it apparently uses to slash prey.
Wandering Albatross
Perhaps the longest wingspan of any bird, and in a year off from breeding some circle Antarctica twice or even three times.
Yellowfin Tuna
A warm-muscled torpedo that can swim across an entire ocean.