I just spent the last 45min looking shit up about that worm and other similar worms. Shit is extremely interesting...its called a Bobbit worm. Got the name from this american couple John and Lorena Bobbit. Lorena Bobbit cut off more than half her husband's penis after he came home from a party (still drunk) and raped her. So she cut his dick off. The worm comes into play because after the female mates with the male, it bites off the male's penis and feeds it to the young.

Food for thought.