A renewable energy technology company in Australia designed this power generation system inspired by the shape of the tailfins of sharks, tuna and mackerel. The currents on the ocean floor impose a force on the fin of the BioStream device. The to-and-fro motion of the fin is directed into a specially designed gearbox that converts the oscillating motion into a rotational motion that drives a conventional dynamo.
The fins are approximately 15 meters high (50 ft); the tails are 20 meters (66 ft) long. Systems are being developed for 250kW, 500kW, and 1000kW capacities to match conditions in various locations.