An odd array of lines probably caused by some form of benthic fauna.
These are reminiscent of Nazca lines, particularly the bird wings.
Why do they only extend through a semi-circle instead of completing the circle?
Image ID: expn2432, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Location: Gulf of Mexico, Keathley Canyon, 2600 meters depth
Photo Date: 20140420T151045Z
Credit: NOAA OKEANOS EXPLORER Program, Gulf of Mexico 2014 Expedition
• High Resolution Photo Available