The Stingray tidal stream energy device is an oscillating hydrofoil. The idea behind the design is that it would have minimal impact on the environment. The developers designed this device to be easily disassembled and reassembled for ease in shipping.

An artist's rendering of the Verdant Power tidal turbine. Verdant currently has the only operating tidal turbines in the United States.

An artist's rendering of the Marine current turbine, dual rotor, monopile design. This is the design used in the concept-level feasibility report done by EPRI. It is one of the few designs that has a structure piercing the surface of the water.

The SMD Hydrovision TideEl device is tethered to a simple mooring device on the sea floor. The turbine then floats in the tidal stream and can orient itself with the currents.

Lunar Energy’s ducted turbine design. The duct focuses the current, which allows for a smaller turbine. Each turbine is expected to generate 1.2 megawatts of electricity.

This OpenHydro turbine is a finned turbine with only one moving part. The designers are planning for it to be lubricated with water to prevent contaminating the environment.