Overview

• The mantis shrimp's dactyl club can deliver strikes with the force of a .22 caliber bullet, yet it remains undamaged due to its unique structural design.
• Researchers identified a layered Bouligand structure within the club that selectively filters high-frequency stress waves, protecting the shrimp's delicate tissues.
• The impact region of the club is reinforced with mineralized fibers in a herringbone pattern, preventing fractures during intense blows.
• The findings could inspire the development of synthetic materials for protective gear, blast injury prevention, and energy-harvesting implants.
• Future studies aim to explore the club's properties through 3D simulations and advanced underwater experiments for a deeper understanding of its mechanics.