Fish
Great White Shark
The ocean's most famous apex predator
Ocean & marine habitats
Marine biomes are not one habitat but a stack of environments: sunlit shallows, productive upwellings, migratory flyways over open water, and dark abyssal plains. This hub gathers Global Animal Guide species whose profiles list ocean, sea, coastal, or marine habitats.
Quick answer
Oceans hold most of Earth's living space — from coral reefs and coasts to the open sea and deep trenches. Whales, sharks, sea turtles, seabirds, and countless invertebrates depend on salinity, currents, and depth zones that define marine life.
Iconic species
Iconic ocean animals in the guide include the blue whale, great white shark, bottlenose dolphin, green sea turtle, and emperor penguin — each with answer-first profiles on size, diet, and conservation.
Threats & pressures
Shared marine threats include overfishing, bycatch, ship strikes, plastic and chemical pollution, ocean noise, and climate-driven warming and acidification that bleach reefs and shift prey.
How to explore further
Continue with freshwater and wetlands hubs for inland water, or use Identify sound guides for whales and coastal birds.
- Browse ocean species — Full diet-sorted list of marine profiles
- Freshwater habitats — Rivers, lakes, and ponds
- Whale sounds ID — Songs, clicks, and calls
- Learn biology — Classroom explainers
Species in ocean animals
Ranked by profile popularity. An animal may also appear in other biomes if it uses multiple habitats.
Mammal
Arctic Fox
The white fox of the frozen tundra
Bird
Wandering Albatross
The widest wingspan on Earth
Mammal
Blue Whale
The largest animal that has ever lived
Reptile
Leatherback Sea Turtle
The giant jellyfish specialist
Mammal
Polar Bear
The largest land carnivore, ruler of the Arctic
Invertebrate
Octopus
The shape-shifting genius of the sea
Reptile
Hawksbill Sea Turtle
The tortoiseshell turtle
Fish
Ocean Sunfish
The heaviest bony fish
Fish
Rainbow Trout
The colourful fly-fisher's favourite
Mammal
Bottlenose Dolphin
One of the ocean's most intelligent animals
Mammal
Orca
The ocean's top predator
Show 79 more species
Fish
Thresher Shark
The whip-tailed hunter
Mammal
Walrus
The tusked giant of the Arctic ice
Mammal
Red-necked Wallaby
The rusty-shouldered grazer of eastern Australia
Mammal
Beluga Whale
The white whale of the Arctic
Bird
Emperor Penguin
The largest penguin, built for the Antarctic winter
Reptile
Loggerhead Sea Turtle
The powerful-jawed sea turtle
Bird
Osprey
The fish-hunting raptor of coasts and lakes
Mammal
Humpback Whale
The acrobatic singer of the seas
Mammal
Fin Whale
The sleek greyhound of the seas
Bird
Atlantic Puffin
Clown-billed seabird of North Atlantic cliffs
Fish
Basking Shark
Second-largest fish; gentle plankton feeder
Fish
Clownfish
The reef fish that lives among stinging tentacles
Fish
Sand Tiger Shark
The toothy aquarium shark
Bird
Whooping Crane
Tallest North American bird and conservation icon
Bird
Bald Eagle
The fish-hunting raptor and national bird of the United States
Mammal
Sea Otter
The tool-using keystone of the kelp forest
Mammal
Manatee
The gentle sea cow of warm coastal waters
Fish
Nurse Shark
The docile reef bottom-dweller
Invertebrate
Jellyfish
The ancient, brainless drifter of the seas
Fish
Great Barracuda
Torpedo-shaped reef ambush predator
Reptile
Eastern Diamondback Rattlesnake
Largest rattlesnake of North America
Bird
Common Loon
Iconic diving bird of northern lakes
Bird
Brown Pelican
The plunge-diving fisher
Mammal
Dugong
The gentle sea cow of the Indo-Pacific
Fish
Largetooth Sawfish
Giant ray with a toothed rostral saw
Bird
Blue-footed Booby
Plunge-diving seabird with vivid blue feet
Reptile
Saltwater Crocodile
The largest living reptile and most powerful bite on Earth
Mammal
Sea Lion
The agile, barking acrobat of the coast
Mammal
Narwhal
The tusked unicorn of the sea
Mammal
Grey Seal
The horse-faced seal of the Atlantic
Reptile
Tuatara
Living-fossil reptile unique to New Zealand
Reptile
Eastern Coral Snake
Brightly banded venomous elapid of the Southeast
Mammal
Minke Whale
The smallest and most abundant rorqual
Bird
Magnificent Frigatebird
Aerial pirate with a scarlet throat pouch
Fish
Oarfish
World's longest bony fish
Mammal
American Mink
The semi-aquatic mustelid
Bird
Grey Heron
The patient wetland hunter
Reptile
Green Sea Turtle
The gentle, long-lived grazer of tropical seas
Mammal
Harbor Seal
The shy, spotted true seal of northern coasts
Fish
Whale Shark
The largest fish in the world
Fish
Shortfin Mako Shark
The fastest shark in the ocean
Mammal
Otter
The playful, water-loving member of the weasel family
Fish
Atlantic Salmon
The fish that swims upriver to spawn
Fish
Hammerhead Shark
The shark with a head like a hammer
Fish
Tiger Shark
The wide-ranging scavenger of warm seas
Fish
Blobfish
The deep-sea fish that only looks like a blob out of water
Bird
Roseate Spoonbill
Pink wader with a sweeping spoon bill
Bird
Northern Gannet
Plunge-diving giant of Atlantic cliffs
Bird
Common Murre
Pear-egg diver of northern sea cliffs
Fish
Megamouth Shark
Deep-sea filter ghost discovered in 1976
Fish
Oceanic Whitetip Shark
Critically Endangered lord of the open ocean
Fish
Porbeagle
Warm-blooded hunter of cold Atlantic seas
Fish
Cookiecutter Shark
Bioluminescent plug-biter of the deep
Fish
Lanternfish
Bioluminescent commuter of the twilight zone
Fish
Common Guitarfish
Critically Endangered shovel ray of sandy coasts
Invertebrate
Box Jellyfish
Cube-shaped killer of Australian shallows
Invertebrate
Moon Jellyfish
Glass-disc drifter of harbours worldwide
Invertebrate
Dumbo Octopus
Fin-flapping octopus of the abyssal plain
Invertebrate
Crown-of-thorns Starfish
Spiny coral scourge of Indo-Pacific reefs
Fish
Manta Ray
The gentle giant that flies through the sea
Fish
Atlantic Bluefin Tuna
The warm-blooded ocean speedster
Fish
Bull Shark
The shark that swims into freshwater
Fish
Swordfish
The ocean hunter armed with a sword
Fish
Stingray
The flat-bodied ray with a venomous tail
Invertebrate
Cuttlefish
The color-changing master of camouflage
Fish
Blue Tang
The bright blue reef fish from Finding Nemo
Fish
European Eel
The 100-year reproductive mystery that baffled scientists from Aristotle to the 21st century
Invertebrate
Starfish
The five-armed drifter that regrows its limbs
Invertebrate
Blue Crab
The swift swimming crab of Atlantic estuaries
Fish
Moray Eel
The reef-dwelling eel with hidden jaws
Invertebrate
Atlantic Horseshoe Crab
The ancient living fossil with blue blood
Reptile
Asian Water Monitor
One of the largest lizards in the world
Bird
Atlantic Puffin
The colorful 'sea parrot' of the North Atlantic
Bird
Peregrine Falcon
The fastest animal on the planet
Invertebrate
Giant Squid
The elusive deep-sea giant with enormous eyes
Bird
Common Raven
One of the world's most intelligent birds
Fish
Anglerfish
The deep-sea hunter with a glowing lure
Invertebrate
Giant Clam
The reef-dwelling giant of the mollusks
Fish
X-ray Tetra
The see-through fish of the Amazon
Frequently asked questions
What is a ocean & marine habitat?
Ocean and marine habitats cover most of Earth's surface — from sunlit coral reefs and coastal shelves to the open pelagic zone and deep trenches. Salinity, currents, depth, and temperature shape which animals can live there. Whales, sharks, sea turtles, seabirds, and countless invertebrates depend on healthy seas.
Which animals live in ocean & marine habitats?
Species lists on this page are drawn from Global Animal Guide profiles whose habitat facts match ocean & marine keywords. Browse the ranked list for answer-first guides covering diet, range, and conservation.
How is ocean & marine different from other biomes?
Ocean & marine is defined by climate, vegetation, and water availability that favour particular body plans and behaviours. Compare sibling biome hubs (ocean, forest, desert, and more) to see how the same animal groups specialise differently.