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Pictures Great white shark dorsal fins breaking surface near Seal Island, False Bay, Geyser Rock and Dyer Island.

Great White Shark Dorsal Fin

Shortly before sunset we were sailing with our boat close to Seal Island in the False Bay. There is a large seal colony on this island. Some fish bait hangs on a small red buoy, which is held into the water from the boat. A great white shark has followed the trail of the scent and has reached our boat. The dorsal fin can be seen quite distinctively. It is an individual, special feature of recognition of the shark, unique and unmistakable.
Following the article, which appeared in the edition of „Wissenschaft” on 20th August, 2004, US biomechanics have deciphered the use of the rakish shape of the shark fin. The dorsal fin and also the tail fin with its asymmetric composition ensure the mobility of the shark. The researchers analysed the swirls of current (high-speed camera), created in an upward motion by the enlarged fin. “The current conducts the water simultaneously backwards and downwards”, as explained by Cheryl Wilga and George Lauder from the Rhode Island University. “In this way the vertical manoeuvrablility is increased.“
With fishes with symmetrical fins, swirls of current are formed around a rotational axis, however the shark allows the water to flow in a more complicated way. Two swirl centres layered above each other stabilise it with sideways (or lateral) and vertical movements (Wissenschaft 20/08/2004).

Biological Profile

Carcharodon carcharias
IUCN Red List of Threatened Species

Dorsal fin of a Great White Shark (Carcharodon carcharias)

Great White Shark dorsal fin - sleek and efficient

Dorsal fin of a Great White Shark (Carcharodon carcharias)

Dorsal fin of the Great White Shark, cutting through the water

Dorsal fin of a Great White Shark (Carcharodon carcharias)

Dorsal fin of the Great White Shark, cutting through the water

Great White Shark dorsal fin on the water surface

Dorsal fin Great White Shark near Seal Island

Great White Shark dorsal fin (carcharodon carcharias)

Dorsal fin of a Great White Shark (Carcharodon carcharias)

Dorsal fin Great White Shark - sleek and unmistakeable

Dorsal fin of the Great White Shark, cutting through the water in False Bay

The dorsal fin of the Great White Shark: a unique distinguishing mark

Dorsal fin of the Great White Shark, cutting through the water

Dorsal fin of a Great White Shark (Carcharodon carcharias)

The typical dorsal fin of a Great White Shark off Seal Island

Dorsal fin of a Great White Shark (Carcharodon carcharias)

Dorsal fin of the Great White Shark - typical and unique

Dorsal fin of the Great White Shark off an island with fur seals

Dorsal fin of the Great White Shark - unmistakeable

Dorsal fin of the Great White Shark off an island with fur seals

Dorsal fin of a Great White Shark (Carcharodon carcharias)

Dorsal fin of the Great White Shark off Seal Island

Dorsal fin of the Great White Shark (Carcharodon carcharias)

Dorsal fin of the Great White shark cutting through the water off Dyer Island

Dorsal fin of the Great White shark - distinctive and unmistakeable

The dorsal fin of the Great White shark is cutting through the sea

Dorsal fin of a Great White Shark (Carcharodon carcharias)

Dorsal fin Great White Shark (Carcharodon carcharias)

Dorsal fin of a Great White Shark (Carcharodon carcharias)

© Klaus Jost - wildlife- & nature- & underwater
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