A diver has captured a dramatic video of a crab squaring up to an octopus on the seabed in Australia. The video sees the blue-ringed octopus crawling along the seabed before encountering the crab, ...

This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American Florida stone crabs (Menippe mercenaria) are ...

Crabs can't swim all that fast, so nature has granted them defensive traits that make them the impenetrable forts of the underwater world. Their steel-tough exoskeletons have jagged points that make ...