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The seemingly indestructible fists of the #mantisshrimp can take a punch
When a team of researchers from Northwestern studied the dactyl clubs of one mantis shrimp species, they found that they have layered structures that selectively block sound waves, acting as protective gear against vibrations that could otherwise harm the shrimp. These types of structures, known as phononic mechanisms, filter out sound waves that could otherwise cause nerve and soft tissue trauma.
https://arstechnica.com/science/2025/02/the-seemingly-indestructible-fists-of-the-mantis-shrimp-can-take-a-punch/