What scientists know about fat innkeeper worms

Thousands of fat innkeeper worms (aka the “penis fish”) washed up on the shores of a Northern California beach this month. These creatures are invertebrates, commonly found underground. Its name, innkeeper, refers to how it builds tunnels for other aquatic creatures. The worm can live up to 25 years, and is considered a delicacy in some parts of the world.



  • Patrick Krug - marine biologist at California State University, Los Angeles