Armed with a 3D-printed crustacean chassis and an ego the size of its oversized claw, Wavy Dave strutted onto the mudflats of Portugal like a tiny silicon Travolta. His goal: wiggle that one stupidly ...

Researchers have built a robot crab that can compete in claw-waving displays with real fiddler crabs, but "Wavy Dave" doesn't always come out unscathed.

In the future, a goal is to affix one of those to a crab robot. Meanwhile, companies with offshore wind turbines or platforms used in the harvesting of oil and gas could use the crabs to test the ...