Photographer Franco Banfi and a team of scuba divers were following a pod of sperm whales when suddenly the large creatures became motionless and began to take a synchronized vertical rest. This strange sleeping position was first discovered only in 2008, when a team of biologists from the UK and Japan drifted into their own group of non-active sperm whales. After studying tagged whales the team learned this collective slumber occurs for approximately 7 percent of the animal’s life, in short increments of just 6-24 minutes.
The image, Synchronized Sleepers, was a finalist in the 2017 Big Picture Competition in the category of Human/Nature. You can see more of the Switzerland-based photographer’s underwater photography on his website and Instagram. (via kottke.org)