NB This is a post I did on awwnverts and decided to add it here. I've included some extra photos of ol' Eunice, as I wanted to show how beautifully iridescent it is, as well as some really nice (glamorous) head shots!
They live tropical and subtropic bodies of water in the Indo-Pacific. They've been discovered in Bali, New Guinea, the Philippines, Australia, Fiji, and Indonesia!
Peters' Monocle Bream tropical fish have been observed 'mobbing' Bobbit Worms by directing sharp jets of water at them in order to deter their attacks!
Bobbit Worms can decimate aquariums. They can arrive as small worms hidden in rocks and corals and can remain undetected for quite some time. Don Arndts heroic battle against a Bobbit Worm is the stuff of legends. His foe was a wily adversary despite the many attempts to poison and kill it, including glue and crushed glass hidden in baited shrimp! TLDR version here
Their jaws are wider than their bodies are retractable and open like scissors!