Whales, dolphins, and other cetaceans.
Test your knowledge with these top questions!
In which cold ocean region do narwhals live year-round?
Narwhals stay among Arctic pack ice, moving between offshore winter areas and coastal summer bays.
What kind of animal is a dolphin, even though dolphins live in water?
Dolphins breathe air, bear live young, and nurse calves with milk, the same traits that define other mammals.
What do Southern Resident orcas in the Pacific Northwest mainly hunt?
Southern resident orcas favor fatty Chinook salmon, and Chinook declines leave these pods short of food.
How deep can narwhals dive when hunting prey?
Narwhals hunt Greenland halibut and cod during dives that can last about 25 minutes.
Which seawater property has a narwhal's tusk been shown to detect?
Tiny channels through the tusk's surface connect seawater with sensory tissue inside this unusual tooth.
An orca's dark back and pale belly illustrate which color pattern?
Dark backs blend with deep water from above while white bellies match bright surface water from below.
What is a social group of orcas called?
Orca pods often center on older females, and many offspring stay with their birth pod for life.
Which Arctic whale carries the nickname "unicorn of the sea"?
The nickname comes from the male narwhal's long spiral tusk, which can grow about three meters long.
In Shark Bay, what do some dolphins wear on their beaks while hunting on the seafloor?
Young females often learn sponge carrying from their mothers; sons adopt the technique much less often.
Which freshwater dolphin often develops pink skin as it grows older?
Male Amazon river dolphins often become pinker as pale scar tissue builds up from bites during fights with other males.