Scientist found a reason why fish stay in a group called schools and why they have leader. They have made a robot fish that they dropped n water that had fishes already in it. The fish have exsped the robot and also let it become the leader of the school.
''n nature, school leaders beat their tails faster than the followers do. This has led researchers to believe that the followers are enjoying a swimming advantage from the leader’s efforts'' the reason why the took his fish n is because the leaders taile is faster and more powerful.
they hope that if they put the robot fish in water well large bodies of water it might go in to a toxic thinggy like the oil spill which may cause a monfuction and cause it to brake.
this artical is very cool because i didn't know that fish thought that way and it was very cool to read this and find this out. ilove the artical.