Page 115 - NT 2022 Almanac

No one likes to come across a jellyfish while they are swimming, so it is probably not going to be good news to you that we are seeing more and more of them on our beaches! This is because of climate change, which is making our oceans warmer than they used to be, so jellyfish are able to move into areas that were once too cold for them. Also, the oxygen levels in the sea have fallen by about 2 per cent over the last 50 years, and this means that jellyfish now have the perfect environment in which to live. On top of all this, we have been taking too many fish out of the seas, so that fish such as tuna, which would normally eat jellyfish, are not such a danger to them any longer.
The six types of jellyfish found in British waters are:
Moon jellyfish (UK-wide)
Compass jellyfish (mainly in the South)
Blue jellyfish (common in the South West and Wales)
Lion’s mane jellyfish (North Wales, North of Scotland)
Barrel jellyfish
(the South West, Ireland, Wales, West of Scotland)
Mauve stinger jellyfish (rare but can be found along the south coast)
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