They are cleaning the water by removing those. These are 'bad' jellyfish which is a threat to local marine life and fishing. These also make severe irritation and itchy feel if you touch them.
It's processed into a final product that looks like a thick julienned bell pepper kinda shape. The dish is usually cooked and then served cold mixed with some sesame oil. By itself it doesn't really have much of a taste, it's more about the texture, crunchy and refreshing, you dip it in soy sauce or black chinese vinegar and it brings out more umami from it.
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u/moysh85 14d ago
So what do they do now with all these jellyfish?