Dung trails on the seafloor. Holothurians and other creatures such as acorn worms plow up the surface of the seafloor. Over thousands of years, it is probable that the whole surface of the seafloor is disturbed by such biological activity.

Image ID: expl6744, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Location: Caribbean Sea, Mid-Cayman Rise
Photo Date: 2011 August 13
Credit: NOAA Okeanos Explorer Program, Mid-Cayman Rise Expedition 2011

• High Resolution Photo Available