Flying, swimming robot jellyfish

The robot jellyfish swimming and flying in the videos below are being shown off at the Hannover Trade Fair this week by industrial automation company Festo. We wrote before about their robotic manta ray which also moves very gracefully.

Both jellyfish designs are really just for show. But if the swimming ones could achieve the simple efficiency of real jellyfish they could provide great platforms for cheap ocean sensors. Even if they don't, they'd be a great addition to any aquarium. - NewScientist