Sharks are caught by humans for shark meat or shark fin soup. Select examples include the tiger shark, blue shark, great white shark, mako shark, thresher shark, and hammerhead shark. Several species are apex predators, which are organisms that are at the top of their food chain. They have numerous sets of replaceable teeth.
Shark bridge photo skin#
Sharks have a covering of dermal denticles that protects their skin from damage and parasites in addition to improving their fluid dynamics. They generally do not live in freshwater, although there are a few known exceptions, such as the bull shark and the river shark, which can be found in both seawater and freshwater. Sharks are found in all seas and are common to depths up to 2,000 metres (6,600 ft).
They range in size from the small dwarf lanternshark ( Etmopterus perryi), a deep sea species that is only 17 centimetres (6.7 in) in length, to the whale shark ( Rhincodon typus), the largest fish in the world, which reaches approximately 12 metres (40 ft) in length. Since then, sharks have diversified into over 500 species. Acanthodians are often referred to as "spiny sharks" though they are not part of Chondrichthyes proper, they are a paraphyletic assemblage leading to cartilaginous fish as a whole. Under this broader definition, the earliest known sharks date back to more than 420 million years ago. Notable examples of improper classification include Cladoselache, and various other members of the Chondrichthyes class like the holocephalid eugenedontidans. However, the term "shark" has also been (incorrectly ) used to refer to extinct members of the subclass Elasmobranchii, which are technically outside the Selachimorpha clade. Modern sharks are classified within the clade Selachimorpha (or Selachii) and are the sister group to the rays. Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. So there you have it, for those of you who ever wanted to know the anatomy of a hoax.Clockwise from top left: spiny dogfish, Australian angelshark, whale shark, great white shark, horn shark, frilled shark, scalloped hammerhead and Japanese sawshark representing the orders Squaliformes, Squatiniformes, Orectolobiformes, Lamniformes, Heterodontiformes, Hexanchiformes, Carcharhiniformes and Pristiophoriformes respectively. At this point I don’t think you are suprised. What about the photo of the year? Yes, that seems to be made up as well…. He said that the helicopter would be underwater swimming with the shark. I asked a pilot friend of mine what would happen if a helicopter hovering no more than 12-15 feet off the water were suddenly pulled down on by a that much weight. The great white shark weighs about 1200 kg or over 2500 lbs. National Geographic’s web site contains the picture below and from the caption you can infer that it was taken off the coast of Cape Town, South Africa.
The picture of the shark was taken by Underwater Photographer Charles Maxwell. So how does the shark fit in? Well perhaps this is where we find the only thread of truth in the story, however thin it may be. Here’s another picture of the north tower of the Golden Gate Bridge. Their website included the picture below.
They are based at the Moffett Federal Airfield on the southern end of San Francisco Bay. The picture is very likely the 129th Rescue Wing of the California National Guard in training. It’s turns out to be the north tower of the Golden Gate Bridge in San Francisco. From what we can see, it is obviously a very large bridge. What about the location of the picture? Is this South Africa? If you look at the picture, you will notice in the background a distinctive bridge of a redish color. Even more interestingly, on a US Air Force web site can find this picture associated with a fact sheet on the Pave Hawk.
The Helicopter is in actually a US Air Force HH-60G Pave Hawk. So let’s take a look at the different elements of the picture and what we know about them. AND YOU THINK YOUR HAVING A BAD DAY AT WORK !!Although this looks like a picture taken from a Hollywood movie, it is in fact a real photo, taken near the South African coast during a military exercise by the British Navy.It has been nominated by Geo as “THE photo of the year”.
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