This brown seaweed lives in the lower shore and gets its name from the serrated edges to its fronds.

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 gentle giant is the largest shark in UK seas, reaching up to 12m in length. There's no need to fear them though, they only eat plankton!

Native oysters are a staple of our seas and our plates - but our love of their taste has lead to a sharp decline all around the UK.

The moon jelly is the most common jellyfish in UK seas, often washing up on our beaches. No need to worry though - it doesn't sting humans.

The river lamprey is a primitive, jawless fish, with a round, sucker-mouth which it uses to attach to other fish to feed from them. Adults live in the sea and return to freshwater to spawn.