Control and preventive measures of malignant flooding of jellyfish. One way is to use protective oil to deal with jellyfish. If applied to the body, you can not be afraid of jellyfish attacks, on the contrary, you can chase jellyfish to play. Another method is to set up some artificial fences or use fire nozzles to stop and blow away jellyfish. More wonderfully, an Australian expert proposed to use a vaccine against jellyfish growth to effectively inhibit the reproduction of jellyfish. It is said that this vaccine was developed in his dangerous room.