Oceans

Abalones are marine snails with broad muscular feet and flattened shells.

The Adelie penguin is the most widespread penguin of the Antarctic coast.

The African penguin is the only penguin that breeds on the African continent.

Albatrosses are ocean-going seabirds.

Anchovies are small schooling fishes.

Marine angelfishes differ from the freshwater aquarium fishes with the same common name.

Anglerfishes include many different marine hunters.

The Atlantic cod is a cold-water fish of the North Atlantic.

Atlantic mackerel are streamlined schooling fishes of northern seas.

The Atlantic puffin is a small black and white seabird with a bright triangular bill.

The Atlantic salmon hatches in a river, grows up at sea, and returns to the same river to spawn.

Barnacles are crustaceans whose adults are fixed in place.

Barracudas are streamlined predators with conspicuous teeth.

The basking shark is a very large fish that gathers small plankton rather than chasing large prey.

The beluga whale is a white toothed whale of Arctic and sub-Arctic seas.

The bigfin reef squid lives in warm coastal waters around reefs and seagrass.

The black marlin is a large predatory billfish of the Indo-Pacific.

Blennies include many small fishes living close to the bottom.

The smooth-head blobfish is an Australian deep-water fish with a broad head, loose skin and a tapering body.

The blue dragon sea slug floats upside down at the ocean surface.

The blue mussel is a coastal bivalve that forms dense beds on suitable surfaces.

The blue tang is a brightly coloured Indo-Pacific reef fish.

The blue whale is the largest animal that has ever lived.

The blue-footed booby is a seabird of the eastern Pacific that dives on schools of small fish.

The common bottlenose dolphin is a social marine mammal with a curved dorsal fin.

The bowhead whale is a heavy Arctic baleen whale that breaks sea ice with its huge arched head.

Box jellyfishes are named for their angular bells.

Boxfishes have unusually rigid bodies.

Brittle stars have a central disc and long flexible arms.

The bull shark is a robust coastal shark that can also spend time in fresh water.

Butterflyfishes are conspicuous reef inhabitants with flattened bodies.

The clownfish lives inside the stinging tentacles of a sea anemone, which it cleans and defends in return.

Living coelacanths are lobe-finned fishes, rather than unchanged survivors of a single fossil species.

The colossal squid is a deep-water cephalopod of Antarctic and subantarctic seas.

Copepods are small crustaceans with major roles in ocean food webs.

Corals include many colonial animals.

True crabs include many forms.

Cuttlefish are shell-bearing cephalopods with remarkable camouflage.

The dugong is a large marine mammal that grazes seagrass in warm, shallow coastal water from East Africa to Vanuatu.

The Dungeness crab inhabits the Pacific coast of North America.

Electric rays have specialised organs that produce electrical discharges.

Elephant seals are large marine mammals.

The emperor penguin is the largest penguin and the only bird that breeds through the Antarctic winter.

The false killer whale is a large black dolphin of warm, deep seas that hunts tuna and squid in pods bound by lifelong ties.

The fin whale is the second longest animal alive and one of the fastest of the great whales.

Flounders are flattened fishes adapted to life near the bottom.

Flyingfishes escape the water in gliding leaps.

The gentoo penguin is the third largest penguin and the fastest swimmer of the family.

The giant clam is a large reef-dwelling bivalve of the tropical Indo-Pacific.

The giant Pacific octopus is the largest octopus.

The giant squid is an elusive deep-water cephalopod with exceptionally long feeding tentacles.

Gobies include many small bottom-associated fishes.

The great auk was a large flightless seabird of the North Atlantic that swam with its wings and caught fish under water.

The great white shark is the largest predatory fish.

The green sea turtle grazes on seagrass in warm coastal waters.

Groupers are stout predatory fishes with large mouths.

Haddock are North Atlantic fishes that feed largely near the seabed.

Hagfishes are jawless marine animals with elongated bodies.

Halibuts are large flatfishes that hunt near the seabed.

Hammerhead sharks have unusually wide heads.