If they respect the narwhal, they'll understand.
They are the unicorn of the sea, which is much more interesting than the chicken of the sea, or sea monkeys for that matter. Now we have enough visual references to make this narwhal hat cute, yet scientifically accurate, in a very loose interpretation of scientific.When they ask just remind them that the narwhal is an elusive, shy whale. Narwhals: elusive, magical, legendary.