The Portuguese Man-of-War looks like a jellyfish but isn’t (it’s not an individual entity but rather a collection of very tiny creatures called, zooids. Honest). Usually found in sub-tropical waters, the venomous invertebrate is a recent visitor to the British Isles, closing beaches there (for good reason – its sting is severely painful). Rising ocean temperatures are responsible for the migration of a legion of marine species, some of which haven’t ventured this far north in two to three million years. This includes grey whales who’ve found their way from the Pacific to the North Atlantic via a passage created by melting sea ice (Henry Hudson, eat your heart out). All told, the migrations could have serious consequences for commercial fisheries and on the marine environment (for details, visit