A blanket of dead fish has covered the sea at a popular Greek tourist hotspot. The floating carcasses across the port left a stench that alarmed residents and authorities who raced to scoop them up before the odour reached nearby restaurants and hotels . Authorities have started collecting hundreds of thousands of dead fish that poured into a tourist port in the central city of Volos this week after being displaced from their usual freshwater habitats during flooding.

“It spans kilometers,” city council member Stelios Limnios told Reuters. “It’s not just along the coast, but also in the center of the Pagasetic Gulf,” he said, referring to the area offshore Volos whose coast is lined with holiday homes. On Wednesday, trawlers dragged nets to collect the fish that were then dumped in the back of trucks.

More than 40 tonnes have been collected in the last 24 hours, authorities said. Volos mayor Achilleas Beos said the smell was unbearable. During a press conference on Wednesday he blamed the government for not dealing with the problem before it reached his city.

He said that rotting fish could create an environmental disaster for other species in the area. Experts said the problem was caused by historic floods last year that inundated Thessaly plane further north, including rivers and lakes. A net was not placed at the mouth of the river leading into Volos, they said.

When the fish met the sea, the saltwater likely killed them. “They didn’t do the obvious, to put a.