Giant Size
Immense physical body mass providing thermal stability, predator deterrence, and enormous internal digestive capacity.
Leatherback Sea Turtle
The only sea turtle with no hard shell, and big enough to keep its core warm in near-freezing seas.
Lion's Mane Jellyfish
Often called the world's longest jellyfish, with tentacles speculated to trail up to 120 feet through Arctic and temperate seas.
Megamouth Shark
A filter-feeding shark first known from 1976, when one got tangled in a research ship's parachute anchor.
Moose
Half-tonne boreal giant, antlers that are the fastest-growing tissue of any mammal, and stilt legs that sometimes give it an edge over wolves in deep snow.
Southern Elephant Seal
The largest living carnivoran, with a roaring nose and blood built for breath-holds of up to two hours.
Wels Catfish
Europe's largest freshwater fish, and on one French river, a hunter that beaches itself to grab pigeons off a gravel island.
Whale Shark
World's largest fish, an ocean giant armored in tooth-like scales down to its eyeballs, that filters its food out of seawater.
White Rhinoceros
1,800 to 2,700 kilograms of armored grey hide and a keratin horn, carrying a name nobody has ever actually proven right.