Scientists from England made some robots that look like fish. The robots can swim just like fish does. Scientists will put these fish robots into the sea near Spain this year. These fish robots will help people find out the pollution in water and they can also be used in saving the lives. If the fish robot is able to finish their work successfully, scientists hope they can be used in waters around the world.
The fish robot is about 1. 5 meters long. It can swim as fast as swimmers at a speed(速度) of 0. 5 meters a second(秒). There is a detector(探测器) in their bodies. The detector can find the pollution in the water, and then the fish robots will eat part of it. It can also help to find lives in the water and bring them to the beach.
The robots all have a special battery(电池). Because of it, the robots can"swim"for eight hours in the sea freely and don't get tired from doing the same stroke(泳姿) again and again. So. they send back information to people on the beach efficiently(高效地). When their energy runs down, they will go back to the beach by themselves. But the study shows that these robots have some flaws. Scientists say there are still some things that need to be improved. The robots are not ready to take the place of humans.
Now, there are five fish robots in all. The cost(花费) of them are too high now. Each costs about 29, 000 dollars. They are part of a three-year program between engineering company BMTGroup and Essex University in England.
