Marine mammals
17 questions tagged Marine mammals — spanning every one of the seven Ws.
Why do whales sing underwater?
Whales use long, loud vocalizations to communicate across huge distances in the ocean. In species like humpbacks, songs may help with mating displays and social interaction.
Why do sea otters hold hands while sleeping?
Sea otters sometimes hold paws or wrap themselves in kelp so they do not drift apart while resting. It is a practical way to stay together in open water.
Why do some whales dive so deep?
Deep-diving whales chase prey like squid and fish that live far below the surface. Their bodies are adapted with large oxygen stores and pressure-tolerant physiology.
What is a sea otter?
A sea otter is a marine mammal known for using tools and having very dense fur. It lives in the North Pacific and helps keep kelp forests healthy.
What is a dugong?
A dugong is a sea mammal related to manatees that feeds mainly on seagrass. It lives in warm coastal waters across the Indo-Pacific.
Where are sea otters found in the wild?
Sea otters live along the North Pacific coasts, from Japan and Russia to Alaska and California. They are famous for using stones as tools.
Where do humpback whales migrate to breed?
Humpback whales breed in warm tropical and subtropical waters, often around islands and shallow coastal areas. They migrate there from colder feeding grounds each year.
Where are blue whales most often seen?
Blue whales are found in oceans around the world, usually in open water and along productive feeding areas. They are especially visible in some feeding grounds such as the North Pacific and Southern Ocean.
What is a beluga whale?
A beluga whale is a small white whale that lives in Arctic and sub-Arctic waters and is known for its flexible neck and vocal sounds.
Why do whales sometimes dive so deep?
Whales dive deep to find food, avoid predators, and exploit prey that live far below the surface. Deep-diving species are built with special adaptations for storing oxygen and managing pressure.
Why do some dolphins use mud rings to catch fish?
Some dolphins trap fish by circling them and stirring up mud, which creates a barrier that makes the fish leap or cluster tightly. The dolphins then take advantage of the confusion to feed.
What is the North Atlantic right whale?
The North Atlantic right whale is one of the world’s most endangered large whales, with only a few hundred individuals left.
When was the sea otter first scientifically described?
The sea otter was first described in 1777.
When was the manatee first scientifically described?
The West Indian manatee was first described in 1793.
Which sea animal is the largest in the world?
The blue whale is the largest animal ever known, and it can grow to around 30 meters long and more than 150 tonnes.
How do whales and dolphins use echolocation to find prey?
They emit clicks and listen for the returning echoes to map objects and locate fish or squid.
How do whales sing, and why do they make such complex sounds?
Whales use vocal structures in their airways to produce calls for communication, navigation, and mating.