Thanks to Wi-Fi technology, they will then be able to transmit the information to the port's control centre via a "charging hub" where the fish can charge their batteries. This will enable the authorities to map in real time the source and scale of the pollution (see attached graphic).
Robot Fish: Essex University Scientists Develop Robotic Fish Capable Of Detecting Pollution In Water | Technology | Sky News
BMT Group Limited - News - Robotic fish: the latest weapon in the fight against water pollution
FT.com / Climate Change Challenge - Robot fish to hunt down pollution
UK team builds robot fish to detect pollution | Science | Reuters
Robot Fish to Detect Ocean Pollution
Okay: Robo-Fish To Detect Ocean Pollution - Geekologie
Robotic Fish to Patrol Oceans for Pollution (Video) : TreeHugger