Big Seaweed Search

The Big Seaweed Search is a joint project between the Marine Conservation Society and the Natural History Museum. The Big Seaweed Search asks volunteers to identify, photograph and record 14 key seaweed species that can be found around the UK coastline.

Our coast is home to an amazing variety of seaweeds. 650 different species live and grow around the UK.

It may be a bit slippery and slimy, but seaweed is a real ocean superhero. Studying seaweeds can tell us a lot about wider ocean and environmental conditions. By taking part in the Big Seaweed Search, you’ll be helping to gather vital evidence that can be used to map and document any changes to our coastal environments.

How to take part in the Big Seaweed Search

Whether you live by the sea or only visit every now and again, you can get involved in the Big Seaweed Search! It’s free, fun, and suitable for everyone – you don’t need to be a scientist to get involved.

The more data we gather, the more knowledge and influence we have to fight for the future of our seas.

Take our seaweed quiz

Do you know your dabberlocks from your bladder wrack? Test your knowledge with our seaweed quiz to find out if you're a novice or ninja. You might learn some surprising facts about seaweed along the way.