The UK is home to so many incredible sea slugs, like this elegant nudibranch.

This small sea snail is easily identifiable by the 3 brown spots on the top of its shell.

A small, but feisty scavenger, this carnivorous sea snail does not let anything go to waste!

This brightly coloured and easily recognizable fish is one of three gurnard species found in UK seas. Collectively, gurnards are known as sea robins.

Brittle stars, sea urchins and other starfish will want to stay out of the way of this speedy carnivorous starfish!

This seagrass species is a kind of flowering plant that lives beneath the sea, providing an important habitat for many rare and wonderful species.

Worms in the sea are anything but dull and this fan worm, resembling a Catherine wheel, is a perfect example of the intricate beauty these animals possess.

The common whelk is the largest sea snail found in UK seas, though you're more likely to find the dry balls of empty whelk egg capsules washed up in strandlines.