Hundreds of passengers have been stranded on a cruise ship floating off Australian coast after a fungus was found growing on its hull. The Viking Orion was reportedly denied permission to dock in Adelaide after authorities discovered a "marine growth" on the ship. Australia's fisheries department said the fungus - which it called biofoul - was "potentially harmful". Officials said the ship's hull must be cleared before entering the country. Biofoul is an accumulation of microorganisms, plants, algae, or small animal and can allow the importation of invasive species into non-native habitats. The fisheries department said the management of fungus...