Eunice aphroditois, the Bobbit worm, is an aquatic predatory worm dwelling at the ocean floor at depths of approximately 10 metres (33 ft) to 40 metres (130 ft).

This organism buries its long body into an ocean bed composed of gravel, mud, or corals where it waits patiently for outside stimulus to reach one of its five antennae. 

Armed with sharp teeth, it is known to attack with such speeds that its prey is sometimes sliced in half. Although the worm hunts for food, it is omnivorous.