A salmon farm manager in Finnmark urges fishermen to report pearl necklace siphonophore (jellyfish) sightings after blooms caused skin and eye injuries and breathing problems in farmed salmon near Øksfjord/Hammerfest.

The invasive carpet sea squirt (filtsjöpung), known as “sea vomit,” is rapidly spreading across the seafloor in Kosterhavet National Park, smothering organisms beneath it. Authorities say budget cuts have hampered monitoring and control, but they are now examining ways to slow the outbreak.