|Ned, Nora and Nicky Narwhal|
Adult male narwhals have a large, overgrown left canine tooth that grows through the upper lip into a long tusk. This tusk has earned them the nickname "unicorn of the sea." About 15% of adult females also grow a tusk. Very rarely (like 1 in 500), an adult male will grow two tusks with the right one being shorter than the left. Unlike other animals that grow tusks, the narwhals tusks are spiral like a screw and have sensory receptors on the outside.
|Alternate layout. The same tusk pattern can be used for the female narwhal.|
Most of the articles I read described baby narwhals as being a dark blue-gray color, but they appear to be light colored in the one photo I found online. I guess we'll have to take our pick and claim poetic license if we get it wrong. 😺