Whales and Dolphins quiz
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How much of a dolphin's brain sleeps at one time?
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More questions about Whales and Dolphins
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What is the heaviest animal known to have ever lived?
Answer: Blue whale
Why: A fossil whale, Perucetus, was proposed as heavier, but a 2024 reanalysis put it at only about 60 to 70 tonnes.
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Where do dolphins get most of their water?
Answer: Their prey
Why: Dolphins also make some water inside their own bodies when they burn fat for energy.
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Which dolphin was the first shown to sense electric fields?
Answer: Guiana dolphin
Why: Until then, the only mammals known to sense electric fields were egg-laying ones such as the platypus.
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What whale is nicknamed the 'sea canary'?
Answer: Beluga
Why: Beluga calls carry so well that people can hear them above the water and even through a ship's hull.
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What are whales' closest living relatives?
Answer: Hippos
Why: Whales and hippos sit together inside the even-toed hoofed mammals, the same order as pigs, camels and cows.
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Whose dive to 2,992 m was a mammal record in 2014?
Answer: Cuvier's beaked whale
Why: One Cuvier's beaked whale in a 2020 study stayed underwater for 222 minutes, about three hours and 42 minutes.
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