This brilliant red and white sea slug would make the perfect nudibranch for a Christmas card image or perhaps a football team mascot!

A small fish found on rocky shores in the south and west of Britain.

This clown-like fish is a favourite amongst divers and snorkellers. They are inquisitive little souls and will investigate divers near their hidey-hole homes.

Once widespread, this attractive plant has declined as a result of modern agricultural practices and is now only found in four sites in South East England.

Large scale drainage in the UK has seen a massive reduction in the range of this sensitive aquatic plant which now only occurs in around 50 sites in England.

Bladder campion is so-called for the bladder-like bulge that sites just behind the five-petalled flower - this is actually the fused sepals. Look for it on grasslands, farmland and along hedgerows…

The rare heath fritillary was on the brink of extinction in the 1970s, but conservation action turned its fortunes around. It is still confined to a small number of sites in the south of England,…