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Humpback whale (Megaptera novaeangliae), surfacing off Half Moon Island in the South Shetland Island Group, Antarctica, Polar Regions

Adult Commerson's dolphin (Cephalorhynchus commersonii), surfacing in Stanley Harbor in the Falkland Islands, South America

Humpback whale (Megaptera novaeangliae) surfacing in the Weddell Sea near the Antarctic Peninsula, Antarctica, Polar Regions

An adult bull among a pod of about 20 killer whales (Orcinus orca) in Antarctic Sound near the Antarctic Peninsula, Polar Regions

California gray whale calf (Eschrictius robustus), being touched by tourist in San Ignacio Lagoon, Baja California, Mexico, North America

Adult Peale's Dolphin (Lagenorhynchus australis) bow-riding Zodiacs on New Island in the Falkland Islands

Southern Right Whale (Eubalaena australis) adult surfacing near Puerto Pyramides, Peninsula Valdez, Argentina

Southern Right Whale (Eubalaena australis) adult surfacing near Puerto Pyramides, Peninsula Valdez, Argentina

Southern Right Whale (Eubalaena australis) mother and calf being harassed by kelp gull, Peninsula Valdez, Argentina

An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America

Adult humpback whales (Megaptera novaeangliae) co-operatively bubble-net feeding in Southeast Alaska, United States of America

Adult humpback whale (Megaptera novaeangliae) tail throw among feeding whales in Southeast Alaska, United States of America

A juvenile killer whale (Orcinus orca) encountered off West Craycroft Island in Blackfish Sound, British Columbia, Canada

Adult white-beaked dolphin (Lagenorhynchus albirostris) surfacing in the Svalbard Archipelago, Norway

A lone adult male killer whale (Orcinus orca) encountered in Glacier Bay National Park, UNESCO World Heritage Site, Southeast Alaska, United States of America, Pacific Ocean, North America

Adult female killer whale (Orcinus orca) surfacing in Chatham Strait, Southeast Alaska, United States of America, Pacific Ocean, North America

Adult Commerson's dolphin (Cephalorhynchus commersonii), surfacing in Stanley Harbor in the Falkland Islands, South America

Small pod of eight to ten 'Type A' Oceanic killer whales (Orcinus orca), hunting near Stanley, Falkland Islands, South America

Adult Peale's Dolphin (Lagenorhynchus australis), bow-riding near New Island in the Falkland Islands, South America

Adult Peale's Dolphin (Lagenorhynchus australis), bow-riding near New Island in the Falkland Islands, South America

Southern right whale (Eubalaena australis) mother and calf near whale watching boat in Puerto Pyramides, Argentina, South America

Southern right whale (Eubalaena australis) adult female surfacing head on in Puerto Pyramides, Golfo Nuevo, Argentina, South America

Southern right whale (Eubalaena australis) adult female lifting both her head and flukes out of the water, Argentina, South America

An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America

A young killer whale (Orcinus orca) surfacing in Glacier Bay National Park, Southeast Alaska, United States of America, Pacific Ocean, North America

Humpback whale (Megaptera novaeangliae), surfacing off Half Moon Island in the South Shetland Island Group, Antarctica, Polar Regions

A very rare sighting of an adult Blue Whale (Balaenoptera musculus) surfacing in the Svalbard Archipelago, Norway, Arctic, Europe

Adult fin whale (Balaenoptera physalus) surfacing in the rich waters off the continental shelf near South Georgia, Polar Regions

Adult Commerson's dolphin (Cephalorhynchus commersonii), surfacing in Stanley Harbor in the Falkland Islands, South America

Adult Commerson's dolphin (Cephalorhynchus commersonii), surfacing in Stanley Harbor in the Falkland Islands, South America

Humpback whale (Megaptera novaeangliae) flukes-up dive in the Weddell Sea near the Antarctic Peninsula, Antarctica, Polar Regions

Humpback whale (Megaptera novaeangliae) surfacing in the Weddell Sea near the Antarctic Peninsula, Antarctica, Polar Regions

Baleen whale skeleton, most likely a young Bryde's whale, on lava flow in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

A long-beaked common dolphin pod (Delphinus capensis), traveling off Gorda Banks, Baja California Sur, Mexico, North America

A long-beaked common dolphin (Delphinus capensis), surfacing off Gorda Banks, Baja California Sur, Mexico, North America

An adult Pacific white-sided dolphin (Lagenorhynchus obliquidens) leaping in Johnstone Strait, British Columbia, Canada

Adult Peale's Dolphin (Lagenorhynchus australis), bow-riding near New Island in the Falkland Islands, South America

An adult bull killer whale (Orcinus orca) surfacing in Johnstone Strait, British Columbia, Canada, Pacific Ocean, North America

Adult fin whale (Balaenoptera physalus) surfacing in the rich waters off the continental shelf near South Georgia in the Southern Ocean, Polar Regions

California gray whale (Eschrichtius robustus) mother and calf underwater in San Ignacio Lagoon, Baja California Sur, Mexico, North America

Adult Commerson's dolphin (Cephalorhynchus commersonii), surfacing in Stanley Harbor in the Falkland Islands, South America

Adult Commerson's dolphin (Cephalorhynchus commersonii), surfacing in Stanley Harbor in the Falkland Islands, South America

A pair of long-beaked common dolphins (Delphinus capensis), surfacing off Gorda Banks, Baja California Sur, Mexico, North America

A long-beaked common dolphin (Delphinus capensis), surfacing off Gorda Banks, Baja California Sur, Mexico, North America

Killer whale pod (Orcinus orca) beside tourists in inflatables off Punta Colorada, Isla San Jose, Baja California Sur, Mexico, North America

A pair of long-beaked common dolphins (Delphinus capensis), surfacing off Gorda Banks, Baja California Sur, Mexico, North America

A pair of long-beaked common dolphins (Delphinus capensis), surfacing off Gorda Banks, Baja California Sur, Mexico, North America

Adult California gray whale (Eschrictius robustus), spy-hopping in San Ignacio Lagoon, Baja California, Mexico, North America

Bottlenose dolphin (Tursiops truncatus), leaping into the air near Isla San Pedro Martir, Baja California, Mexico, North America

Killer whale female (Orcinus orca), tail-lobbing off Isla San Lorenzo, Baja California, Sea of Cortez, Mexico, North America

Short-finned pilot whale (Globicephala macrorhynchus) surfacing near Isla San Pedro Martir, Baja California, Mexico, North America

California gray whale (Eschrichtius robustus) mother and calf underwater in San Ignacio Lagoon, Baja California Sur, Mexico, North America

California gray whale (Eschrichtius robustus) mother and calf underwater in San Ignacio Lagoon, Baja California Sur, Mexico, North America

California gray whale calf (Eschrichtius robustus) breaching in San Ignacio Lagoon, Baja California Sur, Mexico, North America

California gray whale (Eschrichtius robustus) mother and calf underwater in San Ignacio Lagoon, Baja California Sur, Mexico, North America

Adult bottlenose dolphin (Tursiops truncatus), leaping into the air near Santa Rosalia, Baja California Sur, Mexico, North America

California gray whale (Eschrichtius robustus) mother and calf underwater in San Ignacio Lagoon, Baja California Sur, Mexico, North America

Adult sperm whale (Physeter macrocephalus) flukes-up dive near Isla San Pedro Martir, Baja California, Mexico, North America

Adult male humpback whales (Megaptera novaeangliae) compete for a female in esterus, San Jose del Cabo, Baja California Sur, Mexico, North America

Close-up of eye of a California gray whale (Eschrichtius robustus)l underwater in San Ignacio Lagoon, Baja California Sur, Mexico, North America

California gray whale (Eschrichtius robustus) flukes underwater in San Ignacio Lagoon, Baja California Sur, Mexico, North America

Adult male humpback whales (Megaptera novaeangliae) compete for a female in esterus, San Jose del Cabo, Baja California Sur, Mexico, North America

California gray whale (Eschrichtius robustus) calf underwater in San Ignacio Lagoon, Baja California Sur, Mexico, North America

California gray whale (Eschrichtius robustus) mother and calf underwater in San Ignacio Lagoon, Baja California Sur, Mexico, North America

California gray whale (Eschrichtius robustus) mother and calf underwater in San Ignacio Lagoon, Baja California Sur, Mexico, North America

Adult long-beaked common dolphi (Delphinus capensis) leaping near Isla Carmen, Baja California Sur, Mexico, North America

Adult Commerson's dolphin (Cephalorhynchus commersonii), Rio Deseado, Puerto Deseado, Santa Cruz, Patagonia, Argentina, South America

Adult Commerson's dolphin (Cephalorhynchus commersonii), Rio Deseado, Puerto Deseado, Santa Cruz, Patagonia, Argentina, South America

Grey whale (eschrichtius robustus) san ignacio, baja california, mexico, close-up of barnacles and lice on whales skin

Humpback Whales (Megaptera novaeangliae) feeding on Krill in Wilhelmena Bay, Antarctic Peninsular and surfacing wth a metre of a zodiak. The whales migrate here in the summer to feed on the Krill. Krill numbers have declined by over 50%. They feed on algae that grows on the underside of sea ice, As the sea ice melts, both algae and krill decline. This shot has penguins resting on an iceberg in the background.

Humpback Whales (Megaptera novaeangliae) feeding on Krill in Wilhelmena Bay, Antarctic Peninsular. The whales migrate here in the summer to feed on the Krill. Krill numbers have declined by over 50%. They feed on algae that grows on the underside of sea ice, As the sea ice melts, both algae and krill decline. An expedition cruise ship in the background

Humpback Whales (Megaptera novaeangliae) feeding on Krill in Wilhelmena Bay, Antarctic Peninsular. With passengers from an expedition crusie in Zodiaks. The whales migrate here in the summer to feed on the Krill. Krill numbers have declined by over 50%. They feed on algae that grows on the underside of sea ice, As the sea ice melts, both algae and krill decline.

Humpback Whales (Megaptera novaeangliae) feeding on Krill in Wilhelmena Bay, Antarctic Peninsular. The whales migrate here in the summer to feed on the Krill. Krill numbers have declined by over 50%. They feed on algae that grows on the underside of sea ice, As the sea ice melts, both algae and krill decline.

Peale's dolphin (Lagenorhynchus australis) bow riding off the front of a boat off the Falkland Islands in the South Atlantic.

Pacific white-sided dolphin (Lagenorhynchus obliquidens) surfacing, Monterey, California, Pacific Ocean, United States of America, North America

Humpback whale, megaptera novaeangliae. back and blowhole at sunset; mountains as backdrop; evening light

Pacific white-sided dolphin (Lagenorhynchus obliquidens) surfacing, Monterey, California, Pacific Ocean, United States of America, North America

Pacific white-sided dolphin (Lagenorhynchus obliquidens) unusual spinning behaviour, Monterey, California, Pacific Ocean, United States of America, North America

Pacific white-sided dolphin (Lagenorhynchus obliquidens) unusual spinning behaviour, Monterey, California, Pacific Ocean, United States of America, North America

Pacific white-sided dolphin (Lagenorhynchus obliquidens) surfacing, Monterey, California, Pacific Ocean, United States of America, North America

Late phase of an oblique lunge. The Minke whale (Balaenoptera acutorostrata) falls back into the water while its throat is still expanded and water is pushed out under high pressure. St. Lawrence estuary, Canada

Blue whale (Balaenoptera musculus) exhaling a cloud of tiny water droplets into the air. St. Lawrence estuary, Canada

Close up of the blowholes of a Minke whale (Balaenoptera acutorostrata) that lie just posterior of the distinctive ridge stretching over the rostrum. St. Lawrence estuary, Canada

Amazing closeup of a lunging Minke whale (Balaenoptera acutorostrata) feeding on krill. Some of these small euphausiids are still hanging on to the expanded grooves. St. Lawrence estuary, Canada