Most sensitive tooth
Last updated: October 12, 2017 at 20:09 pm
The narwhal’s (Monodon monoceros) single spiral tusk is really an overgrown tooth. It has recently been discovered that there are up to 10 million nerves extending from the surface of the tusk to its central core and ultimately to the Narwhal’s brain. This enables it to detect minute changes in its environment such as pressure, temperature, salinity, and particle layering. Quick taps of the narwhal’s tusk also stun Arctic cod, to render them immobile for capture.
Fisheries and Oceans Canada / WWF
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Jeffrey Gallant is the Editor-in-Chief and Records Keeper of the Diving Almanac. He is also a contributing editor of DIVER Magazine, and the scientific director of the Greenland Shark and Elasmobranch Education and Research Group (GEERG). Jeffrey started diving in 1982.