Wikipedia:
these worms can grow to sizes of nearly 3 m (10 ft)
...
The name "Bobbit worm" was coined in the 1996 book Coral Reef Animals of the Indo-Pacific, in reference to Lorena Bobbitt, who was then very much in the public consciousness. The name is inspired only by the scissor-like jaws of the worm; the common supposition from the name that female eunicids cut off the males' penises is baseless; in fact, the worms lack penises entirely