Brydes Whale (Balaenoptera edeni) with pitted flanks. Azores

Sperm Whale, Physeter macrocephalus, mother and large calf fluking off the Azores Islands

Spotted Dolphin, Stenella frontalis, pair surfacing off the Azores Islands

Striped Dolphin, Stenella coeruleoalba, leaping off the Azores Islands

Short-Beaked Common Dolphin, Delphinus delphis, mother and calf leaping together off the Azores Islands

Risso's Dolphin, Grampus griseus, swimming off the Azores Islands

Risso's Dolphin, Grampus griseus, breaching off the Azores Islands

Aerial view of Fin whale (Balaenoptera physalus) surfacing. Gulf of Maine, USA (rr)

Aerial view of Fin whales (Balaenoptera physalus) surfacing. Gulf of Maine, USA (rr)

Adult fin whales (Balaenoptera physalus) sub-surface feeding in the rich waters off the continental shelf just south of Bear Island in the Barents Sea, Norway.

Aerial view of Fin whale (Balaenoptera physalus) surfacing. Gulf of Maine, USA (rr)

Aerial view of Fin whale (Balaenoptera physalus) surfacing. Gulf of Maine, USA (rr)

Adult Fin Whale (Balaenoptera physalus) surfacing in the lower Gulf of California (Sea of Cortez), Mexico.

Adult Fin Whale (Balaenoptera physalus) surfacing in the lower Gulf of California (Sea of Cortez), Mexico.

Fin whale (Balaenoptera physalus) head passing close beneath a boat. Gulf of California.

Fin whale (Balaenoptera physalus) showing white lower jaw in calm sea. Gulf of California.

Adult fin whale (Balaenoptera physalus) sub-surface feeding (head detail - note the white lower jaw) in the rich waters off the continental shelf just south of Bear Island in the Barents Sea, Norway.

Adult fin whale (Balaenoptera physalus) surfacing in the calm waters off Isla San Esteban in the midriff region of the Gulf of California (Sea of Cortez), Baja California, Mexico. There are an estimated 400 resident fin whales residing in the Gulf of Cali

Finback whale (Balaenoptera physalus) might be seen alone or in pairs but often form groups of more than a dozen animals in order to hunt fish. St. Lawrence estuary, Canada (rr)

Fin Whale, Balaenoptera physalus surfacing off the Azores islands