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

Kevin Schafer / Humpback Whale (Megaptera novaeangliae) group feeding, Chatham Strait, Alaska

Tony Wu / North Pacific hemisphere humpback whale calf (Megaptera novaeangliae kuzira) breaching on a sunny day in the calm waters of Chatham Strait, Alaska, USA, July.

Tony Wu / Eastern Steller's sea-lion (Eumetopias jubatus ssp. monteriensis) juvenile, perched on a buoy. Chatham Strait, near Juneau, Alaska.

Tony Wu / Humpback whales (Megaptera novaeangliae) bubble-net feeding, in front of a dinghy with tourists. Chatham Strait, Alaska, USA.

Tony Wu / Humpback whale (Megaptera novaeangliae) calf breaching (mother was nearby bubblenet feeding) Chatham Strait, Alaska, USA, July

Tony Wu / Humpback whale (Megaptera novaeangliae) calf breaching (mother was nearby bubblenet feeding) Chatham Strait, Alaska, USA, July

Tony Wu / Humpback whale (Megaptera novaeangliae) calf breaching and playing while its mother engaged in bubble-net feeding with a social foraging group of whale nearby, Chatham Strait, Alaska, USA July

Tony Wu / Humpback whale (Megaptera novaeangliae) juvenile playing by raising and slapping its pectoral fin, with snow-capped mountains visible in the background, Chatham Strait, Alaska, USA July

Tony Wu / Humpback whales (Megaptera novangliaea) pod engaged in social foraging by herding herring and other fish with bubble net feeding technique, Chatham Strait, Alaska, USA July.

Tony Wu / Humpback whale (Megaptera novangliaea) engaged in bubble net feeding, note the injury to dorsal fin possibly from boat propeller, Chatham Strait, Alaska, USA July, .

Tony Wu / Humpback whales (Megaptera novangliaea) pod engaged in social foraging by herding herring and other fish with bubble net feeding technique, Chatham Strait, Alaska, USA July.

Tony Wu / Humpback whales (Megaptera novangliaea) pod engaged in social foraging by herding herring and other fish with bubble net feeding, with boat of tourists watching, Chatham Strait, Alaska, USA July.

Tony Wu / Humpback whales (Megaptera novangliaea) pod engaged in social foraging by herding herring and other fish with bubble net feeding technique, Chatham Strait, Alaska, USA July.

Tony Wu / Humpback whales (Megaptera novangliaea) pod engaged in social foraging by herding herring and other fish with bubble net feeding technique, Chatham Strait, Alaska, USA July.

Tony Wu / Humpback whales (Megaptera novangliaea) pod engaged in social foraging by herding herring and other fish with bubble net feeding technique, Chatham Strait, Alaska, USA July.

Tony Wu / Boat with tourists watching Humpback whale (Megaptera novangliaea) pod engaged in social foraging, herding herring and other fish with bubble net feeding technique, Chatham Strait, Alaska, USA July.

Tony Wu / Humpback whales (Megaptera novangliaea) pod engaged in social foraging by herding herring and other fish with bubble net feeding technique, Chatham Strait, Alaska, USA July.

Tony Wu / Humpback whales (Megaptera novangliaea) pod engaged in social foraging by herding herring and other fish with bubble net feeding technique, Chatham Strait, Alaska, USA July.

Tony Wu / Humpback whales (Megaptera novangliaea) large pod surfacing and breathing together in between periods of cooperative bubblenet feeding, the whales typically rest like this after each successful hunt....

Kevin Schafer / Humpback Whale (Megaptera novaeangliae) emerging to swallow prey as the final step for bubble-net feeding, Chatham Strait, Alaska

Kevin Schafer / Humpback Whale (Megaptera novaeangliae) group bubble net feeding, Chatham Strait, Alaska

Hiroya Minakuchi / Dall's Porpoise (Phocoenoides dalli) swimming underwater, Chatham Strait, southeast Alaska

Thomas Mangelsen / Humpback Whale (Megaptera novaeangliae) breaching, Chatham Strait, Southeast Alaska

Thomas Mangelsen / Humpback Whale (Megaptera novaeangliae) breaching, Chatham Strait, Southeast Alaska

Thomas Mangelsen / Humpback Whale (Megaptera novaeangliae) breaching, Chatham Strait, Southeast Alaska

Andrew Peacock / Orca (Orcinus orca) females surfacing, Chatham Strait, Alaska