Invasive salmon, clams and seaweed are next threats to biodiversity in Britain
Pink salmon, Purple Asian clams, marine invertebrates that form spaghetti-like colonies and a nematode worm that causes extensive deaths of trees are among the new entries in experts' watchlist of invasive non-native species that could threaten Great Britain in the next 10 years. The latest version of the watchlist again includes known problem species such as the yellow-legged (Asian) hornet, raccoon and twoleaf watermilfoil.
