Robot jellyfish powered by hydrogen

Last updated at 07:19
To enjoy the CBBC Newsround website at its best you will need to have JavaScript turned on.
Watch 'Robojelly' in action

Engineers have invented a robotic jellyfish, powered by hydrogen.

The robot - nicknamed Robojelly - moves in water by copying the natural swimming motion of a jellyfish.

Researchers from America at Virginia Tech say development of the robot is currently in the early stages.

But they hope it could eventually prove useful in underwater search operations.