The Narwhal’s Magical “Unicorn” Sensor

Meet the “unicorn of the sea”: male narwhals sport a long, spiraled tusk that isn’t just for show. Inside that tooth lives a nerve-filled pulp connected to the brain, letting them detect tiny changes in seawater salinity—handy for finding fish or avoiding freezing traps! It’s like having a built-in oceanic weather station on your head. Next time someone jokes about narwhals being real unicorns, tell them their horns are actually super-sensitive sensors.
Sources:

The Narwhal’s Magical “Unicorn” Sensor

Meet the “unicorn of the sea”: male narwhals sport a long, spiraled tusk that isn’t just for show. Inside that tooth lives a nerve-filled pulp connected to the brain, letting them detect tiny changes in seawater salinity—handy for finding fish or avoiding freezing traps! It’s like having a built-in oceanic weather station on your head. Next time someone jokes about narwhals being real unicorns, tell them their horns are actually super-sensitive sensors.
Sources:

https://www.wired.com/2014/03/narwhal-tusks-enormous-sensory-organs/
https://pubmed.ncbi.nlm.nih.gov/24639076/