How Artificial Structures Are Creating Nurseries for Stinging Swarms

How Artificial Structures Are Creating Nurseries for Stinging Swarms links rising jellyfish blooms to the growing amount of hard, man-made habitat along coasts. The article explains that blooms occur when scyphozoan jellyfish populations surge rapidly, helped by life cycles that can switch between sexually reproducing pelagic stages and asexually reproducing benthic polyp stages. After fertilization, larvae eventually settle on hard substrates to form polyps that can build in very high concentrations. The piece notes that major blooms have been recorded across the Mediterranean, the Black Sea, the Gulf of Mexico, and the Yellow and Japan Seas, with documented disruptions including nuclear-plant shutdowns in Scotland, Israel, and Florida, a 2007 Northern Ireland salmon-farm disaster, and incidents affecting fishing operations in Japan. It says ocean sprawl from offshore energy and infrastructure may be a key factor, alongside other pressures like warming and pollution, though causes remain under study.