hargrove electric power plants. new zealand's been shredded by a turbine as biologist from wagner explains hydroelectric power plants are fraught with risks. getting directly hit by a turbine blade is one cause of death another risk is that a fish gets caught between moving parts and its skin gets torn or damaged. by isn't strong turbulence is also a major problem because it means fish get thrown about like in a washing machine. you know washing machine or. hydroelectric power station operators in europe are supposed to ensure that fish can travel through their turbines and safely for no real fish are used in the requisite safety tests and that's where robotic fish come in. the process of investigating mortality rates involves animal testing and in germany that killed several 1000 fish a year sometimes up to $100000.00. the tests don't always run as smoothly as this one here a fish is swimming through a turbine that's moving very slowly that's not always the case. the aim is to conduct such tests in future with robo