
Crab Facts: Claws, Shells & Secret Behaviors
Crabs are crustaceans found on every continent with over 7,000 species. Discover why crabs walk sideways, trade shells, and grow claws stronger than jaws.

Mantis shrimp are marine crustaceans with the fastest punch in the animal kingdom. Discover mantis shrimp vision, hunting abilities, and unique adaptations.
Mantis shrimp are colorful marine crustaceans famous for having the fastest and most powerful punch in the animal kingdom. Over 450 species exist worldwide in tropical and subtropical waters.
In water, they reach speeds of 50 mph in just milliseconds. The force generates 1,500 Newtons of impact, enough to break through crab shells, mollusk armor, and even aquarium glass. These bubbles collapse with additional force and briefly reach temperatures of 8,000 degrees Fahrenheit. Mantis shrimp can strike up to 50 times in rapid succession.
Mantis shrimp have the most complex eyes in the animal kingdom. Each eye contains 16 types of color receptors. Humans have only 3 types seeing red, green, and blue. Mantis shrimp can see ultraviolet light, infrared light, and polarized light invisible to human eyes.
Mantis shrimp live in tropical and subtropical ocean waters worldwide. Most species are solitary and highly territorial. They excavate burrows in sand, mud, or coral rubble where they spend most of their time. Burrows can extend up to 3 feet deep with multiple chambers.
Mantis shrimp are carnivores that primarily hunt crustaceans, mollusks, and fish. Smasher species target hard shelled prey like crabs, snails, and clams. Their club appendages break through protective shells with repeated strikes. Spearer species hunt soft bodied prey like fish and squid.
Mantis shrimp reproduction varies by species. Some form monogamous breeding pairs while others mate with multiple partners. Courtship involves visual displays showing off their colorful bodies. Lifespan varies from 3 to 20 years depending on species.
Ancient fishermen called mantis shrimp thumb splitters and prawn killers due to painful injuries from handling them.
Scientists initially dismissed reports of mantis shrimp breaking aquarium glass as exaggeration until high speed cameras confirmed the behavior.
The mantis shrimp punch became a viral internet phenomenon, with The Oatmeal webcomic introducing millions to their abilities.
Researchers discovered mantis shrimp vision independently multiple times because the complexity seemed too extreme to be real.
Mantis shrimp fossils date back 400 million years, showing this remarkable body plan evolved long before dinosaurs.
Research proved mantis shrimp strikes create cavitation bubbles that collapse with temperatures briefly reaching 8,000°F.
Scientists discovered mantis shrimp see polarized light, an ability being studied for satellite communication and cancer detection.
Studies showed the mantis shrimp club is made of mineralized layers that dissipate impact, inspiring new body armor designs.
Research revealed their 16 color receptors do not process color the way scientists expected, creating new questions about vision.
Scientists found mantis shrimp can strike up to 50 times per second without damaging their own appendages.
The Oatmeal webcomic about mantis shrimp generated millions of views and made them internet celebrities.
Mantis shrimp inspired designs for advanced cameras, body armor, and impact resistant materials.
Aquarists share stories of mantis shrimp destroying tank mates and cracking glass as cautionary legends.
Zeiss camera company referenced mantis shrimp vision in marketing their color reproduction technology.
YouTube videos of mantis shrimp punching have accumulated tens of millions of views, spreading awareness of their abilities.
Before high speed cameras and detailed research, mantis shrimp were obscure creatures known mainly to aquarists who discovered them as hitchhikers on live rock. Their extraordinary abilities seemed like fishermen's exaggerations.
After scientific studies revealed their record breaking punches and complex vision, mantis shrimp became famous worldwide. They now inspire military armor, medical imaging, satellite technology, and have become internet celebrities. Their biology continues yielding discoveries that seemed impossible.
Mantis shrimp strikes create flashes of light from cavitation bubbles reaching 8,000°F
They have 16 color receptors while humans have only 3, seeing ultraviolet and infrared
Each eye can move independently and provides depth perception without the other eye
Their punch accelerates as fast as a bullet and can break aquarium glass
Some species form monogamous pairs sharing a burrow for breeding and life
Scientists study their eyes to develop better cameras and optical sensors
Mantis shrimp inspired body armor designs using their impact absorbing layered club structure
Their polarized light vision is being studied for improved satellite communication technology
Cancer detection research uses mantis shrimp eye inspired sensors to see polarized light in tissue
Material scientists study how their clubs withstand repeated impacts without fracturing
Climate change and ocean acidification threaten coral reef habitats where many species live
How much do you know? Take this quick quiz to find out!
Mantis shrimp punches create light. The collapsing cavitation bubbles briefly reach 8,000°F and produce visible light through sonoluminescence.
Their vision is not better than ours at seeing colors. Despite 16 receptors, they process color differently and may distinguish fewer hues than humans.
Mantis shrimp are not actually shrimp. They are stomatopods, a separate group of crustaceans more distantly related to true shrimp.
Each eye has trinocular vision. A single mantis shrimp eye can perceive depth independently without needing the other eye.
Their clubs never break from punching. Layered mineralized structures dissipate impact energy and continuously repair micro damage.
Some mantis shrimp are monogamous. Certain species mate for life, sharing burrows and coordinating hunting for over 20 years.
Mantis shrimp punch at 50 mph in water, accelerating as fast as a bullet from a gun. The strike generates 1,500 Newtons of force and creates cavitation bubbles that collapse with additional impact. The punch happens in milliseconds, too fast for prey to react or escape.
This article is reviewed by the Pagefacts team.
Editorial Approach:
This article reveals mantis shrimp punches create 8,000°F light flashes, explains why their 16 color receptors may not see more colors than humans, and shows how their biology inspires body armor and cancer detection technology.
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