Narwhals are elusive and notoriously difficult to study. Image Credit: NOAA
Remarkable new footage has finally helped scientists to explain the purpose of the narwhal's 9ft 'horn'.
Native to the Arctic waters around Greenland, Canada, and Russia, the narwhal is a species of toothed whale that has been likened to the mythical unicorn due to its unique horn-like tusk.
Exactly what this tusk is used for however has long remained something of a mystery, but now new video footage recorded by two drones in the waters off the coast of north-east Canada has, for the first time, revealed that this mysterious protrusion is actually used to ram in to and stun fish.
Measuring up to 9ft in length, the tusk is essentially a canine tooth containing thousands of nerve endings which enable the animals to sense things moving in the water around them.
The new footage, which can be viewed below, was particularly difficult to capture as the species is notoriously shy which has also made studying the animals' behavior something of a challenge.
I wonder if that is not the "purpose" of the horn as much as an after the fact benefit. If you have it, you might as well use it in every way you can. I do love this animal!
Swim softly and carry a big stick! It's interesting that the fish haven't gotten wise to this over the eons. I know if I saw something that big headed my way I'd run or in thyeir case, swim as fast as I could and try to find some place to hide.
Firstly, a horn like that does not evolve full length straight away, but a small horn sounds useless if we accept the above theory to explain what it is supposed to be for. Secondly, if it is really that useful, why haven't a lot more species got it? And lastly, surely they survived just fine without horns before they evolved, so I do not see the great evolutionary advantage it offers which would result in the tusked ones outbreeding the tuskless ones.
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