“It was [an] alive and wriggling parasitic worm in the Kaisen Don ... “Ready-To-Eat (RTE) raw fish is considered a high-risk food as it does not go through a cooking process.
But just a whiff of cone snail venom might also get the worms in the mood. Cone snails pack their potent venom into self-made harpoons, which they then fling into fish, mollusks or worms.
While a human would have to ingest several of these worms to feel the negative effects of their poison, they carry the same venom that can prove deadly when eating poorly-prepared puffer fish.