Stephane Granzotto is a photographer and a filmmaker in France. While he was looking at whales in the Mediterranean sea for his photo book about creatures, He saw some beautiful things about whales. That is the sleeping panthers of whales.
He saw whales sleep deep under the sea in a vertical position. look like. They are standing. Nobody knew how they slept or none had seen until this photographer captured this with his camera.
More info & Photo courtesy: Stephane Granzotto/National Geographic
National Geography said that They take deep breaths and sleep about 45 feet deep in the sea in this position. they sleep for about two hours a time between the breaths. They sleep in pods with 5-6 whales.