From your first link, "Sarcotacid" would make for a great insult. It's a parasite that "prefers attaching to the rectum" (of fish), and females grow into "huge,

From your first link, "Sarcotacid" would make for a great insult. It's a parasite that "prefers attaching to the rectum" (of fish), and females grow into "huge, warty pustules." The pictures are horrific, lol. One of them looks like a bruised and infected scrotum. ...Actually they both kind of do in different ways.