SIXTH TONE SIXTH TONE The robot was successfully tested under extreme temperature and pressure in the Mariana Trench. Watch out, giant squids and anglerfish: There may be a new, artificial addition to Earth’s deep-sea ecosystems. A research team led by scientists from Zhejiang University in eastern China have designed a fish-like robot with a flexible, soft body to explore the greatest depths of the ocean. The battery-powered robot was tested last November in the Mariana Trench — which extends nearly 11,000 meters below sea level — where it flapped around for 45 minutes without being damaged by the extreme cold and high pressure.