What adaptations do marine mammals have for life in the water?
Many adaptations, e.g. a thick layer of fat (blubber), hydrodynamic shape, adapted limbs, special breathing and diving mechanisms...
What do cetaceans include?
Dolphins and whales
Where does the polar bear live?
In the Arctic
How are sea lions different from seals?
Sea lions have visible outer earlobes, and their hind limbs are mobile.
How can be marine mammals further classified?
Cetaceans, pinnipeds, sirens, carnivores
What is the purpose of a whale’s blowhole?
The whale uses its blowhole to breathe air when it swims to the surface.
How many blowholes do whales have?
Large whale species, except sperm whales, have 2 blowholes.
Are pinnipeds carnivores, omnivores or herbivores?
Carnivores.
How long do dolphins live?
Between 15 and 50 years, depending on the species
What is the largest species of marine mammals?
Blue whale
What kind of marine mammal has only 10 individuals living in the wild as of 2023?
Vaquita
How many species of whales are there?
There are about 90 species of whales.
What are pinnipeds?
Pinnipeds are a group of marine mammals that includes sea lions, seals, and walruses.
How do whales sleep?
They sleep by turning off half of their brain, which allows them to continue swimming and breathing.
What do sea otters feed on?
Sea otters feed mainly on crustaceans, bivalves, and fish.
How do marine mammals reproduce?
They reproduce through sexual reproduction, where females give birth to live young and feed them with milk.
How long do pinnipeds live?
Depending on the species, between 20 and 40 years.
What is the average life expectancy of a whale?
Depending on the species, the average life expectancy of a whale can vary between 30 and 90 years.
What kind of pinniped is the largest?
Walrus
Define marine mammals.
Marine mammals are a group of mammals that have adapted to life in the oceans and seas.
What is echolocation?
Some marine mammals, such as dolphins and orcas, use echolocation to send sound waves into their surroundings and listen to their reflections to obtain informat
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