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The shape, size, position and colour of the dorsal fin varies with the type of billfish, and can be a simple way to identify a billfish species. For example, the white marlin has a dorsal fin with a curved front edge and is covered with black spots. [4] The huge dorsal fin, or sail, of the sailfish is kept retracted most of the time. Sailfish ...
A female killer whale surfaces, showing its dorsal fin and saddle patch. See also: Wildlife photo-identification In the early 1970s, Bigg and his colleagues discovered that individual killer whales can be identified from a good photograph of the animal's dorsal fin and saddle patch taken when it surfaces.
The fin whale (Balaenoptera physalus), also known as the finback whale or common rorqual, is a species of baleen whale and the second-longest cetacean after the blue whale. The biggest individual reportedly measured 26 m (85 ft) in length, with a maximum recorded weight of 77 to 81 tonnes (85 to 89 short tons ; 76 to 80 long tons ).
The species was considered to be synonymous with the pygmy sperm whale (Kogia breviceps) from 1878 until 1998. The dwarf sperm whale is a small whale, 2 to 2.7 m (6 ft 7 in to 8 ft 10 in) and 136 to 272 kg (300 to 600 lb), that has a grey coloration, square head, small jaw, and robust body.
“What I saw was the head of the whale and fish on the head. I didn’t see the dorsal fin or saddle patch,” she said, referring to the parts of the whales’ bodies used for identification.
Omura's whale or the dwarf fin whale (Balaenoptera omurai) is a species of rorqual about which very little is known. [3] Before its formal description, it was referred to as a small, dwarf or pygmy form of Bryde's whale by various sources. [4] The common name and specific epithet commemorate Japanese cetologist Hideo Omura . [5] [6]
Short-finned pilot whales are black to dark gray/brown, with a thick tail stock, fluke with sharply pointed tips, bulbous head, and a broad, sickle-shaped dorsal fin. [8] Coloration typically includes light grey to white areas such as a saddle patch behind the dorsal fin, a light grey or white anchor-shaped patch under the chin and belly, and a ...
The dorsal fin of a northern bottlenose whale in Newfoundland with a large linear scar visible. Distinct markings are used to identify unique individual whales and estimate their population size. When physically mature, northern bottlenose whales can reach 9.8 metres (32 ft) in length, [ 5 ] smaller than giant beaked whales , and larger than ...