Salmon deaths on Scotland’s fish farms double – but are jellyfish to blame?

Salmon deaths on fish farms in Scotland nearly doubled last year, official figures show, owing to growing levels of disease, parasites and jellyfish blooms. Campaigners have blamed overcrowding and called for a boycott. Salmon farmers blamed the increase on unusually large numbers of micro-jellyfish that swarmed in British waters last year, a phenomenon that may …