Finback whale (Balaenoptera physalus) arching its back in order to dive showing its tall dorsal fin and patches of green algae that cover its back. St. Lawrence estuary, Canada

finback whale fin whale whales finback balaenoptera physalus arching back st lawrence estuary canada north america water surfacing one animal lone single coastal coastline baleen mammal cetacean dive diving dorsal fin green algae swimming razorback common rorqual sealife sea life