Adult Humpback Whale (Megaptera novaeangliae) breaching in Chatham Strait in Southeast Alaska, USA. Pacific Ocean.

Adult humpback whale (Megaptera novaeangliae) fluke-up dive in the middle of a group of bubble-net feeding humpback whales. Chatham Strait in Southestern Alaska, USA. Pacific Ocean.

Humpback Whale (Megaptera novaeangliae) tail-slapping near researchers. Chatham Strait, Southeast Alaska, USA.

Humpback Whale (Megaptera novaeangliae) fluke-up dive Chatham Strait, Southeast Alaska, USA

Adult humpback whale (Megaptera novaeangliae) tail throw beside the charter yacht Safari Spirit in Chatham Strait, Southeast Alaska, USA. Pacific Ocean. Not property released. (rr)

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 Whale (Megaptera novaeangliae) Adult fluke-up dive. Frederick Sound, Southeast Alaska, USA. Pacific Ocean.

Humpback Whale (Megaptera novaeangliae) tail-throw Chatham Strait, Southeast Alaska, USA. Pacific Ocean.

Humpback Whales (Megaptera novaeangliae) co-operatively bubble-net feeding near the Safari Quest in Chatham Strait in Southeast Alaska, USA. Pacific Ocean.

Humpback Whale (Megaptera novaeangliae) Calf breaching Chatham Strait, Southeast Alaska, USA. Pacific Ocean.

Humpback Whale (Megaptera novaeangliae) Adult, fluke-up dive, off Pt. Adolphus in Icy Strait, Southeast Alaska, USA. Pacific Ocean.

Humpback Whale (Megaptera novaeangliae) flicking flukes. Chatham Straits, S. E. Alaska