Don’t ask what I was doing reading a defence technology website, let’s just concentrate on the fact that UK developed robotic fish are to be released into the sea off northern Spain as part of a three-year research project funded by the European Commission. The purpose of the fish is pollution detection.

The life-like creatures, which will mimic the undulating movement of real fish, will be equipped with tiny chemical sensors to find the source of potentially hazardous pollutants in the water, such as leaks from vessels in the port or underwater pipelines.
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
Unlike previous robotic fish that work with remote controls, these will have autonomous navigation capabilities, enabling them to swim independently around the port without any human interaction. This will also enable them to return automatically to their hub to be recharged when battery life (approximately eight hours) is low.

I’m not going to worry until they start fitting lasers to them.
Read more about these scaly automatons here