Meet the Salamandra Robotica II: a salamander robot that can crawl, walk, and swim. It has a modular design, each with their own microcontroller, so you can take the robot apart, and it will still work.
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Salamandra robotica II swimming and walking at InnoRobo 2013
As the above video shows, Salamandra Robotica II can swim with agility and crawl out of the water. It features foldable limbs.
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