Sleeping Whales by Franco Banfi (6 images)
A group of whales take some time to rest as they all sleep together in a vertical position. A free diver explored underwater and observed the large sperm whales as they snoozed for 10 minutes. The 40ft long sperm whales, known to be quite social, spend around seven per cent of their time sleeping and nap vertically for six to 25 minutes. Underwater photographer Franco Banfi, 58, caught the whales around 65ft underwater as well as his partner, free diver Sabrina, 51, just off the coast...