Approximately 400 000 000 cubic metres of water flows through Saltstraumen, the 150 metre wide, 3 kilometre long strait connecting the Norwegian Sea to Skjerstadfjorden, every six hours. The currents can reach 22 knots, making it the strongest tidal current in the world. The water brought down from the fjord attracts many different types of fish such as cod, saithe and coalfish (pollock). These in turn attract many different types of birds, marine predators and anglers.
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