Hundreds of thousands of farmed fish have died from cold in a lagoon in northwestern Greece after a heavy snowstorm crippled the country this week.

The dead fish, seabream and white seabream, began to emerge on the surface of the Richo Lagoon of Drepano Lake early on Tuesday after temperatures in the water dropped to as low as zero degrees Celsius.

"The destruction is huge, it is estimated there are around...