Octopus Petri dish Xiaomei, played by Li Muyun in the plot of Deep Sea Fish, unfortunately became a Petri dish of mutant octopus at the beginning of the story, and the struggle with monsters along the way was accompanied by the incubation of Xiaomei's next generation of monsters. Big Fish in the Deep Sea tells the story that Cui Li and others go out to sea for gold, but they are involved in a fierce battle with monsters.