Life: The Science of Biology 12e Student Resources is no longer available and it was replaced by Biology and Life Sciences.
Media Clip 30.4: Explosive Extrusion of Ribbon Worm Proboscis
This video shows a nemertean worm extruding its proboscis.
Textbook Reference:
Key Concept 30.2 Many Lophotrochozoans Have Ciliated Feeding Structures or Life Stages