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
Sei Whale Dorsal fin and flank showing cookie cutter shark bites
Aerial view of Sei whale (Balaenoptera borealis) surfacing. Gulf of Maine, USA (rr)
Sei Whale (Balaenoptera borealis). Azores (RR)
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
Sei Whale (Balaenoptera borealis). Azores, North Atlantic. Taken 2008
Aerial view of Sei whale (Balaenoptera borealis) surfacing. Gulf of Maine, USA (rr)
A sighting of adult sei whales (Balaenoptera borealis) in the Drake Passage, Southern Ocean
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)
Aerial view of Sei whales (Balaenoptera borealis) surfacing. Gulf of Maine, USA (rr)
Sei Whale headed for the photographer showing the single ridge along the top of the head
Sei Whale (Balaenoptera borealis). Azores, North Atlantic. Taken 2008
Aerial view of Sei whales (Balaenoptera borealis) surfacing. Gulf of Maine, USA (rr)
Sei Whale mother and calf at the surface
Sei Whale breaking the surface with interesting skin markings
Sei Whale breaking through the waves
Sei Whale Blowing at the surface
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 breaking through the waves. Azores, North Atlantic
Sei Whale mother and calf at the surface
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.