When was the last time you heard about a sea turtle getting stuck in a shipwreck? Never, that's when. Although that's partly because stuck turtles rarely make the news, it's also due to the fact that they're relatively small and highly maneuverable. With that in mind, the European Union-funded ARROWS project has created U-CAT – a prototype robotic sunken-ship-exploring sea turtle.
We’ve already seen several underwater robots that mimic the swimming abilities of fish. The European FILOSE research project, however, is also interested in copying another feature of our finned friends – their lateral line. The result could be swimming robots that use differences in water pressure to navigate and save energy.