Other images on show include a pygmy seahorse camouflaging itself among coral, a sperm whale investigating the photographer, and a bee-eater bird catching a dragonfly for his mate.

BBC: Winning wildlife pictures go on show

However, they were identified as sperm whales by Nick Davies, who runs Gairloch-based Hebridean Whale Cruises and is involved in a Sea Watch project.

BBC: Sperm whales