Sei whale (Balaenoptera borealis) skull, the Neck, Saunders Island, Falkland Islands, South America
Sei Whale (Balaenoptera borealis), blowing at the surface, Azores, Atlantic Ocean, Portugal, Europe
Aerial view of Sei whale (Balaenoptera borealis) surfacing. Gulf of Maine, USA (rr)
Sei Whale (Balaenoptera borealis). Azores (RR)
A sighting of adult sei whales (Balaenoptera borealis) in the Drake Passage, Southern Ocean
Aerial view of Sei whale (Balaenoptera borealis) with calf. Gulf of Maine, USA (rr)
Sei Whale (Balaenoptera borealis). Azores, North Atlantic. Taken 2008
Aerial view of Sei whale (Balaenoptera borealis) surfacing. Gulf of Maine, USA (rr)
Aerial view of Sei whales (Balaenoptera borealis) surfacing. Gulf of Maine, USA (rr)
A sighting of adult sei whales (Balaenoptera borealis) in the Drake Passage, Southern Ocean
Aerial view of Sei whale (Balaenoptera borealis) with calf. Gulf of Maine, USA (rr)
A sighting of adult sei whales (Balaenoptera borealis) in the Drake Passage, Southern Ocean
Aerial view of Sei whales (Balaenoptera borealis) surfacing. Gulf of Maine, USA (rr)
Sei Whale (Balaenoptera borealis). Azores, North Atlantic. Taken 2008
Sei whale surfacing (Balaenoptera borealis) Azores, Atlantic Ocean (RR)
Sei Whale (Balaenoptera borealis). Azores, North Atlantic. Taken 2008
Sei Whale (Balaenoptera borealis). Azores, North Atlantic. Taken 2008
Sei Whale (Balaenoptera borealis). Azores, North Atlantic. Taken 2008
Sei Whale (Balaenoptera borealis). Azores, North Atlantic. Taken 2008
Sei Whale (Balaenoptera borealis). Azores, North Atlantic. Taken 2008
Sei Whale (Balaenoptera borealis). Azores, North Atlantic. Taken 2008
Sei whale (Balaenoptera borealis) is a baleen whale, the third-largest rorqual after the blue whale and the fin whale. Azores, Portugal, Atlantic Ocean.