Robotic fish with flapping fins and tails have been programmed to swim in a school by researchers at the University of Washington in Seattle. They say that artificial fish with group behaviour could track marine pollutants or wildlife such as whales.
Each fish has an onboard computer, depth sensor, and compass, as well as a radio transceiver. During the experiment, the three broadcast their headings to each other, and used any information received to adjust their own courses.
Morgansen says that the group remained coordinated despite having to be reminded where they are going every three seconds. (Via New Scientist)
Gabrielle Zlotin 