Dung trails on the seafloor. Holothurians and other creatures such asacorn worms plow up the surface of the seafloor. Over thousands of years, it isprobable that the whole surface of the seafloor is disturbed by such biologicalactivity.
Date: 2011 August 13
Credit: NOAA Okeanos Explorer Program, Mid-Cayman Rise Expedition 2011
Location: Caribbean Sea, Mid-Cayman Rise