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Adult Dall's porpoise (Phocoenoides dalli) surfacing with characteristic rooster tail splash in Johnstone Strait, British Columbia, Canada, North America

Adult Dall's porpoise (Phocoenoides dalli) surfacing with characteristic rooster tail splash in Johnstone Strait, British Columbia, Canada, North America

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

A pod of transient killer whales (Orcinus orca), catching and killing a harbor porpoise in Monterey Bay Marine Sanctuary, California, United States of America, North America

Two Orca (Orcinus orca) circle a dead Dall's porpoise (Phocoenoides dalli), Monterey, California, United States of America, North America

Harbour porpoise (Phocoena phocoena) arching its back to dive just as its giant relatives do. However, these small cetaceans donÃŒt dive as deep. St. Lawrence estuary, Canada (RR)

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.

Atlantic Spotted Dolphin (Stenella frontalis) with snorkeler on the Little Bahama Banks, Grand Bahama Island, Bahamas.
(Resolution Restricted - pls contact us)

Atlantic Spotted Dolphin (Stenella frontalis)calf near trimaran on the Little Bahama Banks off Grand Bahama Island, Bahamas.
(Restricted Resolution - pls contact us)

Two young Atlantic Spotted Dolphin (Stenella frontalis) at play underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas. Atlantic Ocean.
(Restricted Resolution - pls contact us)

Hawaiian Spinner Dolphin (Stenella longirostris) "spinning" off Waikuli on the coast of Maui, HAwaii, USA. Pacific Ocean.
(Resolution Restricted - pls contact us)

Juvenile Atlantic Spotted Dolphin (Stenella frontalis) underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas. Atlantic Ocean.
(Restricted Resolution - pls contact us)

Atlantic Spotted Dolphin (Stenella frontalis) calves underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas.
(Resolution Restricted - pls contact us)

Atlantic Spotted Dolphin (Stenella frontalis) pair underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas.
(Resolution Restricted - pls contact us)

California Gray Whale (Eschrichtius robustus) calf vertabrae on Isla Tiburon in the Gulf of California (Sea of Cortez), Mexico.

Atlantic Spotted Dolphin pair(Stenella frontalis) underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas.
(Resolution Restricted - pls contact us)

Adult Dall's Porpoise (Phocoenoides dalli) surfacing with characteristic "rooster tail" splash in Icy Strait, Southeast Alaska, USA. Pacific Ocean.
(Restricted Resolution - pls contact us)

Adult Pacific white-sided dolphin (Lagenorhynchus obliquidens) surfacing in the calm waters of the inside passage, Southeast Alaska, USA.

The actual moment of take for a group of five transient Orca (Orcinus orca) that chased, killed, and then ate a single female Dall's porpoise (Phocoenoides dalli) in Icy Strait, Alaska, USA

The actual moment of take for a group of five transient Orca (Orcinus orca) that chased, killed, and then ate a single female Dall's porpoise (Phocoenoides dalli) in Icy Strait, Alaska, USA

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.

Harbour porpoise (Phocoena phocoena) with tail visible through the water and characteristic triangular dorsal fin just leaving the surface. Hebrides, Scotland

Harbour porpoise (Phocoena phocoena) with small blow hole and triangular dorsal fin visible above the surface. Hebrides, Scotland

Harbour porpoise (Phocoena phocoena) showing characteristic pigmentation on its flanks and triangular dorsal fin. Hebrides, Scotland

Bottlenose dolphin and Finless porpoise washed up dead on a beach. Netting from fishing gear that killed them was still attached to their tails. Arabian Gulf, UAE

Adult Hawaiian Spinner Dolphin (Stenella longirostris) head-slapping in the AuAu Channel between Maui and Lanai, Hawaii, USA

Long-beaked Common Dolphin (Delphinus capensis) skull found on the beach at Isla Magdalena, Baja, California Sur. Pacific Ocean. Possible by-catch in purse-seiner?

Atlantic Spotted Dolphin pod (Stenella frontalis) underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas.
(Resolution Restricted - pls contact us)

Harbour porpoise (Phocoena phocoena) caught in herring weir (fish trap). Porpoises trapped in herring weirs often die as a result of efforts to remove them (by 'seining' the weir as shown here) but latterly cooperation between fishermen and researchers has improved the situation. Five porpoises were trapped in this weir and none were thought to have survived this operation. Grand Manan, Bay of Fundy, Canada

Harbour porpoise (Phocoena phocoena). A mother and calf pair, the mother showing that photo id of porpoises may well be possible. Hebrides, Scotland

Young Atlantic Spotted Dolphin (Stenella frontalis) underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas.
(Resolution Restricted - pls contact us)

Atlantic Spotted Dolphin pair (Stenella frontalis) underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas.
(Resolution Restricted - pls contact us)

Adult Dall's Porpoise (Phocoenoides dalli) bow riding in Southeast Alaska, USA. Note: Dall's porpoise is one of the fastest cetaceans in the world!

Long-beaked Common Dolphin (Delphinus capensis) surfacing (note the blow behind head) in the Gulf of California (Sea of Cortez), Mexico.

Harbour porpoise (Phocoena phocoena) in rehabilitation centre, having been rescued from fishing weir, with cream on its back and fin to relieve sun burn. Cape Cod, USA.

Young Hawaiian Spinner Dolphin (Stenella longirostris) leaping in the AuAu Channel off the coast of Maui, Hawaii, USA. Pacific Ocean.
(Resolution Restricted - pls contact us)

Long-beaked Common Dolphin (Delphinus capensis) leaping - note reflection on perfectly calm water surface -in the Gulf of California (Sea of Cortez), Mexico.

Bottlenose Dolphins (Tursiops truncatus) bow riding a pleasure yacht off Los Islotes in the lower Gulf of California (Sea of Cortez), Mexico.

Two adult Adelie penguins (Pygoscelis adeliae) "porpoising" for speed in the Weddell Sea on the Northeast side of the Antarctic Peninsula.

Hawaiian Spinner Dolphin (Stenella longirostris) surfacing in the AuAu Channel off the coast of Maui, HAwaii, USA. Pacific Ocean.
(Resolution Restricted - pls contact us)

Hawaiian Spinner Dolphin (Stenella longirostris) "spinning" in the AuAu Channel between Maui and Lanai, Hawaii, USA. Pacific Ocean.
(Resolution Restricted - pls contact us)

Atlantic Spotted Dolphin pod (Stenella frontalis) underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas.
(Resolution Restricted - pls contact us)

Adult Dall's Porpoise (Phocoenoides dalli) surfacing with characteristic "rooster tail" splash in Icy Strait, Southeast Alaska, USA. Pacific Ocean.
(Restricted Resolution - pls contact us)

Atlantic Spotted Dolphin (Stenella frontalis) calf on the Little Bahama Banks, Grand Bahama Island, Bahamas.
(Resolution Restricted - pls contact us)

Atlantic Spotted Dolphins (Stenella frontalis) underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas.
(Resolution Restricted - pls contact us)

Adult Dall's Porpoise (Phocoenoides dalli) bow riding in Southeast Alaska, USA. Note: Dall's porpoise is one of the fastest cetaceans in the world!

Harbour porpoise (Phocoena phocoena) with tail and triangular dorsal fin visible. Hebrides, Scotland

A group of five transient Orca (Orcinus orca) that chased, killed, and then ate a single Dall's porpoise (Phocoenoides dalli) in Icy Strait, Southeastern Alaska

Adult Peale's Dolphin (Lagenorhynchus australis) bow-riding in the Falkland Islands, South Atlantic Ocean.

Long-beaked Common Dolphin (Delphinus capensis) skull found on the beach at Isla Magdalena, Baja, California Sur. Pacific Ocean. Possible by-catch in purse-seiner?

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.

Bottlenose dolphin (Tursiops truncatus aduncus) and Finless porpoise (Neophocaena phocaenoides) - died from net entanglement. Found on island off coa

Atlantic Spotted Dolphins (Stenella frontalis) underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas.
(Resolution Restricted - pls contact us)

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.

Harbour porpoise (Phocoena phocoena) in rehabilitation centre, having been rescued from fishing weir, with cream on its back and fin to relieve sun burn. Cape Cod, USA.

Hawaiian Spinner Dolphin (Stenella longirostris) mother and calf (note exceptional light color of calf) surfacing in the AuAu Channel off the coast of Maui, Hawaii, USA. Pacific Ocean.

Hawaiian Spinner Dolphin (Stenella longirostris) pod underwater off Lanai in Hawaii, USA. Pacific Ocean.
(Resolution Restricted - pls contact us)

Atlantic Spotted Dolphin (Stenella frontalis) underwater with sargasso on flukes on the Little Bahama Banks, Grand Bahama Island, Bahamas.
(Resolution Restricted - pls contact us)

A single porpoise (Phocoenoides dalli) bow riding in Chatham Strait off Baranof Island in Southeast Alaska, USA

A pair of Dall's porpoise (Phocoenoides dalli) bow riding in Chatham Strait off Baranof Island in Southeast Alaska, USA

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.

Very rare photograph of a curious Harbour porpoise (Phocoena phocoena) visiting the research vessel. St. Lawrence estuary, Canada (RR)

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.

Adult Dall's Porpoise (Phocoenoides dalli) surfacing (note characteristic "rooster tail" splash from body) in the San Juan Islands, Washington State, USA.

Adult Hawaiian Spinner Dolphin (Stenella longirostris) head-slapping (possibly to remove the remora attached to its chest?) in the AuAu Channel between Maui and Lanai, Hawaii, USA. Pacific Ocean.

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.

Harbour porpoise (Phocoena phocoena) showing characteristic pigmentation on its flanks and triangular dorsal fin. Hebrides, Scotland

Young Atlantic Spotted Dolphin (Stenella frontalis) with snorkelers underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas.

Atlantic Spotted Dolphin (Stenella frontalis) pod underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas.

Adult Pacific white-sided dolphin (Lagenorhynchus obliquidens) surfacing in the calm waters of the inside passage, Southeast Alaska, USA.

Adult Dall's Porpoise (Phocoenoides dalli) surfacing in Southeast Alaska, USA. Note: Dall's porpoise is one of the fastest cetaceans in the world!

Hawaiian Spinner Dolphin (Stenella longirostris) pod underwater off Lanai, Hawaii, USA. Pacific Ocean.
(Resolution Restricted - pls contact us)

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.

Adult Dall's Porpoise (Phocoenoides dalli) surfacing in Southeast Alaska, USA. Note: Dall's porpoise is one of the fastest cetaceans in the world!

Atlantic Spotted Dolphin pair (Stenella frontalis) underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas.
(Resolution Restricted - pls contact us)

Adult Dall's Porpoise (Phocoenoides dalli) surfacing in Southeast Alaska, USA. Note: Dall's porpoise is one of the fastest cetaceans in the world!

A pair of Dall's porpoise (Phocoenoides dalli) bow riding in Chatham Strait off Baranof Island in Southeast Alaska, USA

Long-beaked Common Dolphin (Delphinus capensis) surfacing in the Gulf of California (Sea of Cortez), Mexico.

Dalls Porpoise (Phocoenoides dalli) adult surfacing at great speed. Monterey, California, Pacific Ocean. MORE INFO: Displaying characteristic spray of water known as a rooster tail.

Atlantic Spotted Dolphin (Stenella frontalis) underwater with snorkeler on the Little Bahama Banks, Grand Bahama Island, Bahamas.

Adult Dall's Porpoise (Phocoenoides dalli) bow riding in Southeast Alaska, USA. Note: Dall's porpoise is one of the fastest cetaceans in the world!

Adult Dall's Porpoise (Phocoenoides dalli) bow riding in Southeast Alaska, USA. Note: Dall's porpoise is one of the fastest cetaceans in the world!

Atlantic Spotted Dolphin (Stenella frontalis) pod underwater on the Little Bahama Banks, Grand Bahama Island, Bahamas.

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.

Adult Bottlenose Dolphin (Tursiops truncatus gilli) leaping in the upper Gulf of California (Sea of Cortez), Mexico.