The gastropod version of "To Catch a Predator" is brutal. One snail frantically searches for its friend Carl, only to discover that Carl has been assimilated by the parasitic flatworm Leucochloridium paradoxum . This charming little parasite infects snails, takes over their eye stalks, and makes them pulsate with hypnotic stripes—essentially turning them into zombie billboards advertising "EAT ME" to birds. The birds then become the parasite's next host, and the cycle of horror continues. Nature's way of saying "friendship is temporary, parasitism is forever."