These Are Really Amazing Pool Tricks
It's over 9 minutes long but worth it.
Gordian worms live inside crickets for long periods of time, feeding on the cricket's diet. Once fully grown, they inject chemicals into the cricket's brain, brainwashing it and forcing it to kill itself by jumping into the water. Once in water, the worm wriggles out of the writhing body and swims off in search of a mate. Article published in April 2006 Nature magazine.
Crazy how long that worm is?