Do sperm whales sleep? It’s not a question that gets asked frequently, but when it does, none is the wiser to answer it. That’s until now, of course, because now we have photo proof of just how these ocean giants nap.
Pro underwater photographer Franco Banfi was the one who snapped the extremely rare photo while following a pack of sperm whales in the Caribbean Sea, near Dominica Island.
They suddenly stopped moving and went into a synchronized vertical rest. A behavior that was first documented only back in 2008. It’s when a team of biologists from the UK and Japan drifted into a group of completely still sperm whales.
After further studies, they found that this collective nap occurs for approximately 7 percent of the whale’s life, in short intervals of just 6-24 minutes.