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

As its name suggests, Sea spurge is found at the coast. It is an attractive plant that displays cup-shaped, greeny-yellow flowers and fleshy, grey-green leaves.

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

Although, commonly referred to as a ‘sea snail,’ this species in fact belongs to the fish family!

This small, round sea urchin is (unsurprisingly!) green in colour and can be found on rocky shores around the UK.

This colonial creature looks like an old-fashioned quill - that's where the name sea pen comes from.

The black sea bream really is a fascinating fish. From sex changes to nest building, this fish is full of surprises!

The lightbulb sea squirt is common around much of the UK. Its easy to see where its name came from!