Brynjar Gauti / AP

Dead herring are seen floating on Tuesday in Kolgrafafjordur, a small fjord in west Iceland, for the second time in two months.

Between 25,000 and 30,000 tons of herring died in December and more now, due to lack of oxygen in the fjord thought to have been caused by the construction of a bridge across the fjord in December 2004. The current export value of  the estimated 10,000 tons of herring amounts to ISK 1.25 billion ($ 9.8 million), according to Morgunbladid newspaper.

-- The Associated Press

Brynjar Gauti / AP

Workers clear up dead herring on the northern part of Snaefellsnes peninsula, Iceland on Feb. 5, 2013.