SCOTLAND: The Big Picture / Common dolphin (Delphinus delphis) jumping out the water, Shetland, Scotland, UK, January.

SCOTLAND: The Big Picture / Common dolphins (Delphinus delphis) bow riding, in the MInch, near Mingulay, Scotland, UK, June.

Chris Gomersall / Short-beaked common dolphin (Delphinus delphis) breaching alongside ship. Hebrides, Scotland. June

David Fleetham / Common dolphin (Delphinus delphis) porpoising, Mexico.

Chris Gomersall / Close-up of breaching Short-beaked common dolphin (Delphinus delphis), showing tooth marks inflicted by other dolphins - probably during courtship. Hebrides, Scotland. July .

Tony Wu / Female Indo-pacific common dolphin (Delphinus delphis tropicalis) diving back into the water to catch fish. South Africa, Indian Ocean.

Tony Wu / Indo-pacific common dolphins (Delphinus delphis tropicalis) in coordinated attack on baitball. South Africa, Indian Ocean.

Tony Wu / Indo-Pacific common dolphin (Delphinus delphis tropicalis) porpoising while feeding on a sardine baitball. South Africa, Indian Ocean.

Tony Wu / Indo-Pacific common dolphins (Delphinus delphis tropicalis) swimming at speed. South Africa, Indian Ocean.

TOM WALMSLEY / Common dolphin (Delphinus delphis) close up of dolphin surfing at speed, Hebrides, Scotland, UK.

Jordi Chias / Common dolphins (Delphinus delphis) swimming just beneath surface, Santa Maria Island, Azores, North Atlantic

Michael Hutchinson / Common dolphins (Delphinus delphis) bow-riding, watched by tourist, Hebrides, UK, August