Robo Fish-Detecting the polution

Marine Pollution is the burning question of the day. Around the world, scientists are in constant efforts to let it down.  Where there is a need to take measures to control it, there is also a need for it to be detected and measured so that its source and hazards may be known.
Recently, the BMT group has invented a device that is based upon the hydro-dynamic properties and shape of a fish so that it can travel freely in water. This 1.5 meter long robo-fish has an array of micro-sensors that can detect even minute levels of pollution and then, it  sends the records back to the shore. Thus, it provides a constant track of pollution level in a vast area of the ocean while most harbors only take water sample, once a month. It relays the information about the  contamination, constantly, back to the shore for real time updates.