This is Korea. For whatever reason every single animal they consume that has unpleasant bits inside, they leave em in. Bony fish, bony chicken, grisly pork, soup full of shelled shellfish, and shrimp with tails. Hell, frequently entire shrimp head and all. Also locally where I live they have these different shrimp that have I dunno extra tough and sharp carapace. They don't even try to shuck those things.