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  • In Gansbaai, the largest white shark ever caught was at Danger Point and measured up to 5.9m. The exact world record white shark is a contested issue, but chances are it is between 6-7m.

  • If you see a white shark in the water don’t panic. Chances are high that the shark has already detected you and isn’t interested. White shark attacks are normally associated with poor visibility, so avoid murky conditions.

  • White sharks have a unique system called a “counter current heat exchange”, which keeps their body  tempreture +/- 7C above the surrounding water temperature. 

  • All sharks have an incredibly unique system on the tip of their nose called the “ampillae of Lorenzini”. These are small pores filled with a gel that transmits the electrical currents in the water to the shark’s brain so that it can assess its environment.

  • White sharks give birth to live young (not eggs), and they give birth to 6-8 pups at one time. Pups are usually between 1.0-1.5m in length and are born with teeth.

  • Body language has been a well documented form of shark communication and has identified body arching, jaw gaping, and other postures as specific social tactics.

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Sharkwatch SA Blog

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Daily trip 19 March 2012

Monday, March 19, 2012 |  0 Comment Tags: Hagfish, shark cage diving,

Author: Nicola Stelluto (Environmental Ecologist)
My initial love for the environment occurred at a young age when my father and I use to watch animal documentaries on Sunday evenings. I was hooked on anything ocean related when I saw these amazing submersibles going to such extreme depth in the ocean and discovering previously unseen things. To be the first to go somewhere where no one has been before was the first thing that attracted me to the field of natural sciences.

Guest comment: “Thank you so much for the informative and most awesome boat trip ever! It is such a great privilege to see such a magnificent animal in our waters in South Africa!” Gianni and Angenita Giannoccavo.


19/03/2012
Location:
Joubertsdam
Water Temperature: 16.6'C
Depth: 10.6m
Visibility: 1m
Number of Sharks: 6
Conditions: Overcast and poor visibility.

Today the visibility in the Dam was less than desirable; however the sharks were on the scene very quickly! We had several sharks today, ranging in length between 2 and 3 meters. The larger sharks seemed to be preoccupied somewhere else. Most likely taking care of a couple of seals who wondered to far of course. We had a great treat today when a couple of hagfish were swimming in front of the cage. These fish are known locally as the “snot slang”, due to the fact that they secrete large amounts of slime when captured. That was a real treat for everyone on board. All and all it was a great day, with no Monday blues...
 

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