Quirks and Quarks

Mantis Shrimp Pull Their Punches

Despite possessing a punch that could kill an opponent, when Mantis Shrimp fight they avoid giving and taking death blows with non-fatal sparring tactics.

Mantis Shrimp have a powerful punch but their fights lead to no harm

Getting ready to ruuuummmble! (Dr. Roy Caldwell)
Mantis shrimp are crustaceans found in many places around the world. They are known for their two powerful, club-like front limbs, which they uncoil in a very quick motion to strike and kill their prey.

But mantis shrimp are territorial, and often face each other in combat over the burrows in which they live. Scientists, including Patrick Green, a graduate student in the Department of Biology at Duke University in North Carolina, wanted to understand how mantis shrimp don't kill each other when they fight.

What they found is that the shrimp position their tail shields in front of them to absorb the blows from their opponent. As a signal of determination and energy, the shrimp who delivers the most strikes - not the most powerful hits - eventually forces the other to give up the fight. This non-fatal sparring tactic is also known to animals such as elephants and caribou.

Related Links

Paper in Royal Society Biology Letters
- Duke University release
Wired magazine article
The Atlantic article