Eww! But kinda awesome at the same time.
This parasitic worm crawls into the eyestalks of snails, takes over its brain then pulsates to make the mollusk look like a dancing caterpillar.
Yes... I've read several books about parasites because they are so fascinating. I call them the "dark side of evolution", because we rarely notice them but they are ubiquitous. Every organism out there is on average host to four parasitic species
Makes sense considering that milllions of microorganisms share our bodies with us, i.e. the human body hosts millions of them.