When you look out to sea, enjoying the sounds and smells, do you ever wonder what lies beneath the waves?

I've just learned that the longest chalk reef in Europe - and possibly the world - lies just off the glorious coast of North Norfolk.  Twenty miles of rare habitat crammed with exciting, colourful marine life such as purple sea slugs, orange anemones, pink seaweeds, and crabs that go the whole hog on the camoflague front by sticking seaweeds to their shells!  I've swum with seals off the Norfolk coast, but never glimpsed the riches beneath the waves.

So I'll be watching naturalist Mike Dilger tonight as he expolres this impressive habitat on BBC One at 19.30 (Cambridgeshire, East only - or catch it on iPlayer afterwards).

It's a rare and fragile environement situated in one of the busiest stretches of water in the UK - and needs protecting.  The site has been proposed as a Marine Conservation Zone.  If you want to help protect this amazing environment and others like it - support our marine campaign today.