To help explore underwater environments without damaging coral or sea life, engineers from UC San Diego created a robot squid (via Hackster.io). Soft robots are less likely to harm aquatic life than rigid ones. Researchers used mainly soft materials like acrylic polymer to build the device, along with a few 3D printed and laser-cut rigid parts.
The team drew inspiration from the jet propulsion mechanism of real squid to help the robot swim by itself. It takes some water into its flexible body, where it also stores elastic energy. The robot can compress its body to release that energy and use a water jet to propel itself. The device can adjust the nozzle’s position, so it can swim in any direction.