The unseasonably stormy weather has driven hundreds of jellyfish on to the beaches near Newborough. On a stormy tide, the jellyfish are at the mercy of the current, and once they’re beached, they have no way of getting back into the sea again. Hence the strandline of jelly.
The “moon” jellyfish seem to be the most numerous this time. They are recognisable by the four bluey-violet horseshoe shapes inside the jelly.
Although these jellyfish are dead or dying and only have a mild sting when they’re alive, it is best not to touch them with bare skin.
Jellyfish “blooms” are becoming more frequent throughout the world. Some scientists think that they pose a threat to fish stocks (through competition and through predation on fish eggs and larvae) and that more work needs to be done to understand and control jellyfish numbers.
There is one jellyfish which is known as the “immortal” jellyfish because it can reverse its ageing process. Scientists think that there may be great potential for all kinds of pharmaceuticals to be developed from jellyfish. For more on the threats and potential benefits of jellyfish, see this FAO article.