Blue whale
Balaenoptera musculus Habitat
Open ocean
Meet the animals of open ocean and read what we know about how they live there.
8 animals11 articles
Animals: Open ocean
Blue whale
Balaenoptera musculus 
Elephant seals
Great white shark
Carcharodon carcharias 
Humpback whale
Megaptera novaeangliae 
Killer whale
Orcinus orca 
Leatherback sea turtle
Dermochelys coriacea 
Whale shark
Rhincodon typus Articles
Conservation & population
Why Did Megalodon Go Extinct? When It Died Out and Is It Still Alive?
Off the coast of what is now California, about 3.6 million years ago, a large, serrated tooth drifts down onto…
Predators & threats
What eats a blue whale?
Only killer whales are known to hunt blue whales; the first confirmed kills were off Australia in 2019 and 2021.…
Predators & threats
What eats humpback whales?
Killer whales are the only regular predators of humpback whales, and they go after calves. Sharks almost never kill a…
Diet & feeding
What Do Elephant Seals Eat – Elephant Seals Diet
Elephant seals are marine animals that are found on the coasts of both the northern and southern hemispheres. Seals are…
Size & weight
How Big Are Whale Sharks? Dive Into the Fascinating World of the Ocean’s Gentle Giants
Whale sharks, the gentle giants of the ocean, have fascinated marine enthusiasts and scientists alike for years. Their sheer size…
Adaptations
What are the adaptations of a great white shark?
The 3 key adaptations of a great white shark, sorted into structural, behavioural and physiological, with a labelled diagram, myths,…
Conservation & population
Why is Leatherback Sea Turtle Endangered?
The leatherback sea turtle is the largest of all turtles and is one of the most endangered. They are found…
Anatomy & appearance
How long is a blue whale’s tongue?
No one has published a reliable blue whale tongue length. Here's what scientists do know: the tongue turns inside out…
Comparisons
How Big Is a Blue Whale? Length, Weight and Size Comparisons
The biggest blue whales reach about 33 m (108 ft) and 150 tonnes, and females are bigger than males. Sizes…
Comparisons
How Big is a Great White Shark – Great White Shark Size Comparison
The great white shark is a species of large mackerel shark that is found in the coastal surface waters of…
Predators & threats
What eats polar bears? Predators of adults and cubs
Adult polar bears have almost no predators apart from people and other polar bears. Cubs are sometimes killed by adult…