Thousands of tons of invasive seaweed 'overwhelming' Spanish beaches

Alga from south-east Asia is major threat to biodiversity, say experts as they warn of environmental catastrophe Thousands of tonnes of an aggressive invasive seaweed from south-east Asia are piling up on the beaches of the strait of Gibraltar and Spain's southern coast in what local environmentalists say is a major threat to the region's biodiversity. Since May, the local authority in Cádiz has removed 1,200 tonnes of the alga Rugulopteryx okamurae from La Caleta, the city's most popular beach...