A community-owned tidal power turbine in Shetland, Scotland has started exporting electricity to the local grid in what is being hailed a world first.
It is expected the turbine will power up to 30 homes, an ice plant and an industrial estate.
The Nova Innovation turbine is more than 100ft down on the seabed and electricity is transmitted onshore via a subsea cable.
The Scottish government welcomed the start of power generation.
Energy Minister Fergus Ewing, attending the All-Energy Conference in Aberdeen, said: "Scotland is recognized as world leader in wave and tidal energy, with a quarter of Europe's tidal stream and a tenth of its wave-energy potential.
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