SCOTLAND: The Big Picture / Humpback whale (Megaptera novaeangliae) just under surface, off Shetland, Scotland, UK. First ever underwater images of humpbacks in British waters

Tony Wu / Humpback whales (Megaptera novaeangliae) male during a competetive heat run. Vava'u, Tonga, South Pacific.

Espen Bergersen / Humpback whales (Megaptera novaeangliae) bubble net / lunge feeding on herring (Clupea harengus) at dusk, pod co-operative feeding, Kvaloya, Troms, Norway, November

Espen Bergersen / Humpback whale (Megaptera novaeangliae) breaching above surface, Kvaloya, Troms, Norway November

Espen Bergersen / Aerial photo of a school of Atlantic herring (Clupea harengus) in shallow waters with both Humpback whales (Megaptera novaenliae) and Killer whales (Orcinus orca) feeding, coast of Kvaloya, Norway Jan...

Tony Wu / Humpback whale (Megaptera novaeangliae) executing a dramatic tail slap, throwing up a cascade of water with its powerful fluke, Vava'u, Tonga, South Pacific

Tony Wu / Humpback whales (Megaptera novangliaea) unusual scene with two adults tail-slapping together in rough seas, Vava'u, Tonga, South Pacific

Tony Wu / Humpback whale (Megaptera novaeangliae) male breaching in front of Hunga island in Vava'u, Tonga, South Pacific

Tony Wu / Humpback whales (Megaptera novaeangliae) bubble net feeding with mouths open at surface, example of cooperative hunting, Chatham Strait, Alaska, USA July

Tony Wu / Humpback whale (Megaptera novangliaea) executing an energetic tail slap, creating a cascade of seawater, Vava'u, Tonga, South Pacific

Tony Wu / Humpback whale (Megaptera novaeangliae) male calf with his mother. Vava'u, Tonga. South Pacific.

Tony Wu / Humpback whale (Megaptera novaeangliae) male with his penis extended. Vava'u, Tonga. South Pacific.

Tony Wu / Humpback whale (Megaptera novaeangliae) rear view, taken while the whale was staying still and singing. Hunga Channel. Vava'u, Kingdom of Tonga, Pacific Ocean.

Tony Wu / Humpback whale (Megaptera novaengliae) young male twirling and playing in the water, Vava'u, Tonga, Pacific Ocean.

Tony Wu / Humpback whale (Megaptera novaeangliae) males tail fluke, Vava'u, Tonga, Pacific Ocean.

Tony Wu / Humpback whale (Megaptera novaeangliae) calf nuzzling its mother, Vava'u, Kingdom of Tonga, Pacific Ocean.

Tony Wu / Humpback whale (Megaptera novaeangliae) and her calf pursued by males during heat run. Vava'u, Tonga, Pacific Ocean.

Tony Wu / Humpback whale calf (Megaptera novaeangliae) resting under the chin of its mother. Vava'u, Tonga, Pacific Ocean.

Tony Wu / Humpback whale (Megaptera novaeangliae) juvenile male. This is the first verified record of a living humpback whale in the waters off Sri Lanka.

Tony Wu / Humpback whale (Megaptera novaeangliae) juvenile male playing and spinning This is the first verified record of a living humpback whale in the waters off Sri Lanka.

Tony Wu / Humpback whale (Megaptera novaeangliae) male calf with his resting mother. Vava'u, Kingdom of Tonga. Pacific Ocean.

Tony Wu / Humpback whale (Megaptera novaeangliae) male resting, Vava'u, Kingdom of Tonga. Pacific Ocean.

Lucas Bustamante / Humpback whale (Megaptera novaeangliae) fluke above the water as it dives, Machalilla National Park, Manabi, Ecuador.

Wild Wonders of Europe / Widstrand / Humpback whale (Megaptera novaeangliae) tail fluke above water before diving, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of sp...

Wild Wonders of Europe / Widstrand / Humpback whale (Megaptera novaeangliae) tail fluke above water before diving, Senja, Troms County, Norway, Scandinavia, January. Cetaceans are attracted to this area to feed on the large numbers of sp...

Brent Stephenson / Humpback whale (Megaptera novaeangliae) surfacing whilst lunge-feeding, showing the extended throat pleats, Neko Harbour, Antarctic Peninsula, Antarctica, January.

Doug Perrine / Humpback whale (Megaptera novaeangliae) lone female playing, blowing bubble stream, Kona, Hawaii, USA.

Doug Perrine / Humpback whales (Megaptera novaeangliae) mother and calf, Kohala, Kona, Hawaii, USA.

Floris van Breugel / Black and white photograph of humpback whale (Megaptera novaeangliae) tail slapping at surface, Glacier Bay National Park, Alaska, USA, August 2014.

Espen Bergersen / Two Humpback whales (Megaptera novaeangliae) diving during polar night, Kvaloya, Troms, Northern Norway. November.

Espen Bergersen / Three diving Humpback whales (Megaptera novaeangliae) diving during polar night, Kvaloya, Troms, Northern Norway. November.

Espen Bergersen / Humpback whale (Megaptera novaeangliae) with fin above water, Andfjorden close to Andoya, Nordland, Northern Norway. January.

Espen Bergersen / Humpback whales (Megaptera novaeangliae) and Killer whale (Orcinus orca) feeding on a bait ball of Herring. Andfjorden close to Andoya, Nordland, Northern Norway. January.

Espen Bergersen / Fluke of diving Humpback whale (Megaptera novaeangliae) with full moon low on the horizon during polar night time, with blow from second whale in the background, Kvaloya, Troms, Northern Norway. Novem...

Jack Dykinga / Humpback whale (Megaptera novaeangliae) fluke marked with barnacle attachments, CONANP protected area, Baja Sur, Sea of Cortez, Mexico. February.

Pascal Kobeh / Female Humpback whale (Megaptera novaeangliae) with its calf in open water, Reunion Island. Indian Ocean.

Pascal Kobeh / Female humpback whale (Megaptera novaeangliae) with its very young calf at the surface, Rurutu island, Australs Archipelago, French Polynesia. Pacific Ocean.

Bertie Gregory / Humpback whale (Megaptera novaeangliae) adult breaching, Vancouver Island, British Columbia, Canada, July.

David Pattyn / Humpback Whale (Megaptera novaeangliae) tail slapping, tail lob, lobtailing. Vancouver Island, British Columbia, Canada, July.

Doc White / Humpback Whale (Megaptera novaeangliae) female. Tonga, South Pacific, September.

Flip Nicklin / Humpback Whale (Megaptera novaeangliae) breaching, Humpback Whale National Marine Sanctuary, Maui, Hawaii - notice must accompany publication; photo obtained under NMFS permit 0753-1599

Flip Nicklin / Humpback Whale (Megaptera novaeangliae), Humpback Whale National Marine Sanctuary, Maui, Hawaii - notice must accompany publication; photo obtained under NMFS permit 0753-1599

Mike Parry / Humpback Whale (Megaptera novaeangliae) mother and calf, Tonga

Mike Parry / Humpback Whale (Megaptera novaeangliae) swimming, Tonga

Ralph Pace / Humpback Whale (Megaptera novaeangliae) breaching, Maui, Hawaii, sequence 2 of 4

Ralph Pace / Humpback Whale (Megaptera novaeangliae) mother and calf, Maui, Hawaii

Ralph Pace / Humpback Whale (Megaptera novaeangliae) mother and calf with escort, Maui, Hawaii

Chase Dekker / Humpback Whale (Megaptera novaeangliae) breaching, Monterey Bay, California