Five jellyfish species you may encounter more often in UK’s warming seas

While scuba diving off the south-west coast of England this summer, I was lucky to encounter several different species of jellyfish in just a matter of weeks. Many of these, including the compass jellyfish (Chrysaora hysoscella), are already common to UK waters. But among them was one that I had never laid eyes on before—the crystal jelly (Aequorea victoria)—a creature capable of glowing in the dark.

The good news for fellow jellyfish enthusiasts is that both the abundance and…