Ocean
Master of open marine waters, balancing salinity through osmoregulation and traversing major planetary currents.
Goblin Shark
A deep-sea shark with slingshot jaws and skin that looks pink because blood vessels show through it.
Goose Barnacle
A crustacean that glues itself to driftwood, buoys and turtles and rides them across the open ocean.
Great Barracuda
A long, tube-shaped hunter with two sets of razor-sharp teeth that chops big fish in half.
Great Cormorant
A fish-chasing diver with wettable feathers, which has to hang out its wings to dry.
Great Scallop
Edges its mantle with tiny blue-green eyes and swims by clapping its shell
Great Torpedo Ray
170-to-220-volt shocks from a honeycomb of barely visible electric organs, and jaws that stretch to swallow surprisingly big fish.
Great White Shark
Up to 4,500 pounds of apex predator, an electric sense tuned to 0.005 microvolts, and the largest fish known to keep parts of its body warmer than the sea.
Green Humphead Parrotfish
The biggest herbivorous fish on coral reefs, whose males settle rivalries with headbutts.
Green Moray Eel
The reef predator that lies in wait in rock crevices, wearing a thick yellow mucus that turns its dark skin green and protects it from parasites and disease.
Green Sea Turtle
The only sea turtle that is mainly a plant-eater, with a map in its head that is at least partly magnetic.
Greenland Shark
The longest-lived vertebrate known to science, growing under a centimeter a year, with females not sexually mature until at least 156 years old, give or take 22.
Humpback Anglerfish
The female wears a lure on her snout and can swallow a fish longer than herself.
Humpback Whale
The bubble-ring hunter whose songs ripple from one population to the next.
Immortal Jellyfish
A bell up to 3.3 millimetres wide that can turn back into a polyp instead of dying, in the lab at least.
Irukandji Jellyfish
A box jellyfish that fishes for larval fish by twitching its tentacles like lures.
Jaguar
Skull-piercing jaws, a powerhouse swimmer, and the largest cat in the Americas.
King Penguin
Sub-Antarctic penguin with an orange neck patch reaching its upper breast, second largest of all penguins, and a deep diver: tracked birds have gone past 240 meters.
Leafy Seadragon
Seaweed-like flaps, transparent oscillating fins, and a sway like plants in the current.
Leatherback Sea Turtle
The only sea turtle with no hard shell, and big enough to keep its core warm in near-freezing seas.
Leopard Seal
The serpentine apex hunter of Antarctic pack ice with a reptilian gape and teeth that double as krill sieves.
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.
Magnificent Frigatebird
A seabird whose feathers aren't waterproof, riding wings up to eight feet across and mugging other birds for their catch.
Mahi-Mahi
A gold-and-blue ocean sprinter that can pass 4 feet long in its first year.
Marine Iguana
The only lizard in the world that forages in the ocean, grazing algae underwater and sneezing out the salt.