Underwater footage of an "incredible" moment shows a marine biologist seemingly communicating with an octopus as she hunts for crabs. The images, which were shot in the waters of the Great Barrier ...

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 ...

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 ...