A group of adult humpback whales (Megaptera novaeangliae) co-operatively "bubble-net" feeding along the west side of Chatham Strait in Southeast Alaska, USA. Pacific Ocean.

An adult humpback whale breaching (Megaptera novaeangliae) after dissaffiliating from a group co-operatively "bubble-net" feeding along the west side of Chatham Strait in Southeast Alaska, USA. Pacific Ocean.

Humpback Whales (Megaptera novaeangliae) Adults cooperatively bubble-net feeding in Southeast Alaska, USA. Pacific Ocean. Note the expanded ventral pleats as well as the baleen hanging from the upper jaws.

A group of adult humpback whales (Megaptera novaeangliae) co-operatively "bubble-net" feeding along the west side of Chatham Strait in Southeast Alaska, USA. Pacific Ocean. Shown here is an adult tail-throwing after a bubble-net set.

Humpback Whales (Megaptera novaeangliae) Aerial view of adults cooperatively bubble-net feeding in Southeast Alaska, USA. Pacific Ocean. Note the expanded ventral pleats as well as the baleen hanging from the upper jaws.

A group of adult humpback whales (Megaptera novaeangliae) co-operatively "bubble-net" feeding along the west side of Chatham Strait in Southeast Alaska, USA. Pacific Ocean. Shown here is an adult fluke-up diving after a bubble-net set.

An adult humpback whale repeatedly tail-lobbing in the inverted position (Megaptera novaeangliae) after dissaffiliating from a group co-operatively "bubble-net" feeding whales along the west side of Chatham Strait in Southeast Alaska, USA. Pacific Ocean.

Humpback Whales (Megaptera novaeangliae) co-operatively bubble-net feeding near small whale watching boat in Stephens Passage, Southeast Alaska, USA. Pacific Ocean.

A group of adult humpback whales (Megaptera novaeangliae) co-operatively "bubble-net" feeding along the west side of Chatham Strait in Southeast Alaska, USA. Pacific Ocean. This group started feeding together with only six animals and ended up with sixtee

A group of adult humpback whales (Megaptera novaeangliae) co-operatively "bubble-net" feeding along the west side of Chatham Strait in Southeast Alaska, USA. Pacific Ocean. Shown here is an animal fluke-up diving in front of the charter yacht Safari Spiri

A group of adult humpback whales (Megaptera novaeangliae) co-operatively "bubble-net" feeding along the west side of Chatham Strait in Southeast Alaska, USA. Pacific Ocean. This group started feeding together with only six animals and ended up with sixtee

Humpback Whales (Megaptera novaeangliae) Aerial view of adults preparing to dive in order to cooperatively bubble-net feed in Southeast Alaska, USA. Pacific Ocean. Note the expanded ventral pleats as well as the baleen hanging from the upper jaws.

Humpback Whales (Megaptera novaeangliae) co-operatively bubble-net feeding near whale watching boat (note the herring jumping to get away inside the whales mouth) in Stephen's Passage, Southeast Alaska, USA. Pacific Ocean.

Humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding (note the baleen hanging from the upper jaws) Chatham Strait, Southeast Alaska, USA, Pacific coast