Came across this article about a snakehead found in the River Witham (try saying that when your drunk ).

http://www.dailymail.co.uk/pages/liv...n_page_id=1770

The article goes on and states that one of these species in UK waters is a nightmare for environmentalists and conservationalists - why? What does a snakehead do? - or is because they would eat anything and everything (considering those teeth!)

Not something I'd like to come across when diving