TV chef Hugh Fearnley-Whittingstall said it was "vital" that the Government did more to protect UK seas as he led hundreds of campaigners in a march to Westminster in London.
The presenter has urged ministers to increase the number of "marine conservation zones" after more than £8 million was spent on identifying 127 areas where dolphins, seahorses and other rare species most need protection - many zones covering the south east and southern shorelines.
More top news
The grass pollen risk will be very high during warm, sunny weather. Weed pollen will also be airborne
Dry and sunny with long spells of sunshine in the south east and feeling hot
Fine and dry with some good long sunny spells, especially this afternoon and early evening and feeling very warm