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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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Daily trip 20 March 2012

Tuesday, March 20, 2012 |  0 Comment Tags: Gannet, Jellyfish, 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 such a fun and exciting day. You looked after each and every one of us and that’s really special. Sharks were awesome!” Daniella Garance and Eric Berman.
“Baie baie dankie vir n heerlike tyd! Ons het dit baie geniet, julle en die haaie is AWESOME!” Johan en Marily.
 
20/03/2012
Location:
Joubertsdam
Water Temperature: 17.3'C
Depth: 12.2m
Visibility: 1m
Number of Sharks: 8
Conditions: Sunny with wind later in the trip.
 
What a very special day it was on the boat today! We were celebrating a honeymoon with some newlyweds as well as having a party with one of our birthday girls on board! The shark sightings were very active and we barely had to wait 5 minutes for them to arrive! We had several large sharks today with the largest being 4 meters. The increase in wind gust resulted in a large drop in visibility in the water; however the sharks were very accommodating in this regard by simply coming closer to the cage :)! A couple of interesting sightings, other than the sharks of course, were some peculiar jellyfish in the water! I am still going to find out the species name, but if anyone knows its name please comment on the blog! I have added a photo of one of our local Gannets as well! A very entertaining day today...


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