Spot ON, Firebird!!:worship That's exactly what she is. And yes, she is a definate She. I looked them up and they're interesting critters - one of the few members of the worm family that has definate sexual dimorphism. The females are large, dark green and have the two mouthpart deal thing happening. When they are tiny larvae, they swim into a hole or crevice and grow there. Their body looks like a green, fluid filled sausage skin but you never see it - her body, which can grow up to 15cm, remains hidden in the crevice she entered as a larvae. The only part that comes out are the two long probiscus thingys that are actually two parts of her mouth - and those can stretch up to ten times her length. She has no eyes or sensory organs (that we recognise) to speak of and just creeps about, tasting out detritus to eat....kinda like that beer ad where the tongue heads off on its own to get a beer.....always found that ad disturbing, actually.....Anyhoo....
The chemical that gives her body its amazing emerald-sea-green hue is called "Bonellin" which is a powerful biocide - can paralyze small animals and kill bacteria, larvae and red blood cells. For this reason, its being investigated by scientists as a possible model for future antibiotics.
Now for the weird shit.....
As free swimming larvae, the worm has no gender. If it lands in an area unpopulated by its own kind, the larvae develops into a female. All well and good.
If the larvae lands on an adult female, the Bonellin chemical causes the larvae to develop into a male. Also fine and dandy.
But then the male clings to the females body and is absorbed into, or is actuallly sucked up through her feeding probiscus into her body, eventually arriving in her gential sac, where he lives out his life fertilizing eggs and being supplied with all his nutrient needs.
So when I called my ex "a worm", I was fairly close to the truth:p
And that old joke that "males spend 9 months trying to get out and the rest of their lives trying to get back in" seems to be an achievable goal.....if you're a worm....;):D