What is an SSSI?

The River Mease is a Site of Special Scientific Interest

Sites of Special Scientific Interest (SSSIs) are designated under the UK’s Wildlife and Countryside Act and provide statutory protection to conserve and protect the best of our wildlife, geological and geographic heritage for the benefit of present and future generations.

There are over 4,000 SSSIs in England, covering around 8% of the country.

The River Mease represents a lowland clay river supporting nationally significant populations of spined loach Cobitis taenia and bullhead Cottus gobio , two internationally notable species of native freshwater fish with a restricted distribution in England.