Martijn ter Haar, a person from the Netherlands I’ve never met, clearly knows what sort of movies I like to watch. The ones with big parasitic worms crawling around inside a sealed box of fish at the supermarket. Warning: Safe for work, not safe for lunch.
This bad boy is Anisakis, a worm that would much rather be off in the sea than in your gut. Its eggs float through alll the world’s oceans until they’re scarfed up by a crustacean, inside of which they mature into a new larval stage. Their next host is the fish that eats the crustacean–they escape from its gut and drill into its muscle. Finally, the fish is eaten by a dolphin or a seal, whereupon the worm becomes an adult and lives harmlessly and happily, churning out eggs that the predators kindly squirt out with their poop. In other words, the good life.