since the pinkybear started with weird parasites...
here's one..
see the little thing behind the female angler?
that's a male angler..
it attaches itself to a female angler when it finds one, then it becomes part of the female angler.. taking nourishment from the female, slowly losing its fins and everything else including its innards... and in time, becomes a bump on the female body, providing sperm for reproduction and nothing else.. essentially becoming a parasite...