How does the narwhal use its long spiral tusk?
The tusk is actually an enlarged tooth and can grow to be 10 feet long. It is believed to have 10 million nerve endings with sensory capability, and may be used among males to assert dominance.
What do narwhals eat?
They feed primarily on Greenland halibut, but also other fish, squid and shrimp.
How deep do narwhals dive?
They can dive a mile and a half deep in the ocean.
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