Sea lettuce is unmistakeable - most often a bright green and always translucent, it is found on all UK coasts.

One of 2 seahorses found in UK seas, short snouted seahorses are recognisable by their shorter snout - surprisingly enough!

The classic fairy tale toadstool, this red and white fungus is often found beneath birch trees in autumn.

Hornwrack is often found washed up on our beaches, with many believing that it is dried seaweed. In fact, it is a colony of animals!

One of the only venomous fish to be found in British waters, the lesser weever fish is certainly one to watch out for!

Considered Britain's most threatened butterfly, the high brown fritillary can be only be found in a few areas of England and Wales.

Found on rocky shores and seabeds, the Keyhole limpet gets its name from the little hole at the tip of its shell.

A small colourful sea slug that can be found grazing on sea mats on the rocky shore and beyond the low water mark.

This dainty white butterfly is now only found in a few parts of Britain, where it flutters slowly through woodland clearings.

Found almost everywhere, the large yellow underwing is a night-flying moth that is often attracted to lights. It is brown with orangey-yellow hindwings.