Mantis Shrimp Can Punch With the Force of a Bullet

The Deadliest Punch in the Animal Kingdom

The peacock mantis shrimp (Odontodactylus scyllarus) is only about 10–15 cm long. But don't let the size fool you. It possesses a pair of club-like appendages called dactyl clubs that can strike with a peak force of 1,500 Newtons — roughly 2,500 times its own body weight.

The strike accelerates at 10,400 g, reaching speeds of 23 metres per second — roughly the same as a .22 calibre bullet. The strike is so fast it happens in under 3 milliseconds — too fast for the human eye to see.

Cavitation Bubbles: A Second Attack

Even if the first strike misses, the mantis shrimp gets a second chance. The clubs move so fast they create cavitation bubbles — low-pressure vacuums in the water that immediately collapse. This collapse generates a second shockwave nearly as powerful as the original strike, along with a brief flash of light and temperatures near the surface of the Sun.

The mantis shrimp effectively punches twice with every strike — once on impact, once from the imploding bubble.

The Toughest Natural Armour Ever Studied

To withstand delivering such force to itself, the dactyl club has a remarkable internal structure. Engineers at UC Riverside studying it found a herringbone-like arrangement of mineral fibres that redirects cracks, preventing the club from shattering. This structure has directly inspired new designs for military helmets, aircraft panels, and body armour.