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Chordata/Vertebrata

The male of t...

Question

The male of this whale species can easily be recognised by its single, protruding spiral tusk. Which animal are we talking about?

A

Narwhal

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B

Livyatan

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C

Baiji

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D

Minke whale

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Solution

The correct option is B Narwhal
The Narwhal is famous for the long ivory tusk which spirals counter-clockwise several feet forward from its upper lip.
The tusk is actually the whale's upper left canine tooth. Male narwhals commonly have a single tusk, but they sometimes have two tusks.

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