Barrel jellyfish
Giants of the jellyfish world, these incredible creatures are the UK’s largest jellyfish! They can grow to the size of dustbin lids – giving them their other common name: dustbin-lid jellyfish.…
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Chwilio
Blue jellyfish
Often confused with the larger but similarly shaped lion’s mane jellyfish, the blue jellyfish can be colourless when young and develop a striking blue-purple bell as it matures.
Lion's mane jellyfish
The long mane of tentacles that stream out from the lion's mane jellyfish is stunning… literally! Look but don't touch when it comes to these jellyfish - they give a powerful sting.
Moon jellyfish
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.
Identify UK jellyfish
Here are the different types of jellyfish commonly spotted in UK waters. Read our guide to find out what jellyfish you might have seen on local beaches near you.
Compass jellyfish
It's easy to see where the compass jellyfish got its name – its brown markings look just like a compass! They may look beautiful – but they give a nasty sting so keep your distance.
Marine
There's another world waiting beneath the waves. Seals weave in and out of sunlit kelp forests, cuttlefish flash all the colours of the rainbow, starfish graze along the muddy seabed and…
The Wildlife Trusts’ marine highlights and challenges of 2023
Sensational bait ball spectacles at sea, new marine protection and hope for whales and bluefin tuna: The Wildlife Trusts' marine review 2023
Wildlife
Information about wildlife species and habitats in the United Kingdom (UK). Explore more than 1000 pages of wildlife information and facts.
12 Days Wild - Wildlife Trusts
Take part in The Wildlife Trusts' 12 Days of Wild Christmas! We're encouraging everyone to spend 12 Days Wild this year, and get outdoors during the festive period. Sign up and we'll give you lots of advice and tips to help you to take part.
Farming and wildlife
Over 90% of Welsh land is farmed in some way – so how this land is managed has a big impact on wildlife.
Wildlife Trust Wales
Wildlife Trusts Wales is one of 46 Wildlife Trusts in the UK. We work in partnership with the other Wildlife Trusts in Wales to secure a wilder future for Wales.