TELL ME THE TOOTH game

GOOD NEWS!!

The TELL ME THE TOOTH game on the fun things to make and do page is finally fixed. You will now be able to use it freely.

Have a happy new year shark fans!!

The Dusky Shark

  Dusky sharks are a species of requiem shark and they an grow to 4.2 metres (14 feet) long. They spend most of their time in the sunlight zone, but have been recorded to dive as deep as -400 metres. A single dusky shark can migrate from under two hundred to over a thousand kilometres a year in search of food.
  Dusky sharks can be found all over the world. They are common off the shores of Australia, Southern Japan and South Africa. They can also be found in the Atlantic Ocean on the shores of North, Central and South America. However, marine biologists suspect that they can also be found in the Mediterranean Sea in addition to the coasts of West Africa and Spain.

The dark blue shows the dusky shark's recorded range.
The light blue shows the dusky shark's suspected range.

  Dusky sharks are not as prolific feeders as their requiem opportunist counterparts like tiger and bull sharks, however, they are known to scavenge when they reach full maturity (around 20 years of age) and can be found tearing into the flesh of a dead whale amongst other more impressive specimens such as great whites and a group of three or for of them will decimate a porpoise or manatee carcass in seconds. Their bite force of a dusky shark is 60 kilograms per tooth, the equivalent of being crushed by ten cars, is a large contribution to their ability to crack through turtles shells.
  The diet of a dusky shark mainly consists of tuna, mackerel, bluefish and herring. But larger dusky sharks have been known to eat turtles, guitarfish, stingrays,  angel sharks, thresher sharks and dogfish. These sharks really have big appetites!!

A dusky shark in Sea World Queensland, Australia.

A dusky shark swimming in the Pacific Ocean.

Last year, a man wrestled a dusky shark in an attempt to get it away from a group of children. This video is professional footage of the struggle. Do not bother watching beyond 40 seconds as  the shark is not featured beyond that point.
http://www.youtube.com/watch?v=c9Dr1mcpoEA

Dangers to Sharks Part I

  Over the next few months, I will be publishing new posts on dangers to sharks. Each post will be about a different shark.

So what creatures pose a threat to sharks in the watery world they seem to lord over? The answer is that several do. Of course, all this varies depending on which type of shark you are talking about.

  Let’s start with the more imposing of the sharks: the great white. Many see this as king of the sea, mighty lord of all marine life. They are mistaken. Throughout its life, a great white shark will have a minimum of two threats to it. The one permanent threat is human beings. The reasons why- although none are good reasons for it, there cannot be a good one- I have mentioned countless times elsewhere on the blog. As a pup, the threat to great whites comes from octopi. These creatures will wrap a long, suckered tentacle around the shark’s body and reel it in, either for food or protection. Another danger comes from their brothers in arms, for if several great white pups were to be attracted to one, small sized piece of food, there is a chance that they would do damage to each other in order to eat it. 

  As adolescents, these sharks tend to travel between warm coastal waters around the world. These include the Great Barrier Reef, South Africa - for the yearly sardine run - Northern Africa and Southern Europe in the Mediterranean Sea and finally, in some of America's most popular beaches like Florida and Hawaii. Travelling between these places, however, leaves them open to a new danger: adult bull sharks. These sharks do not so much attack to find a meal - there are many easier pickings in these areas like dolphins, turtles, squid and large fish - but to rid themselves of a competitor for food and territory. 

  Finally, as adults, these sharks face a peril more terrible than those it has faced before: killer whales. Although, as their misleading name suggests, many people believe these are the smallest type of whale, they have been, in truth, recently reclassified as dolphins. They often travel in large packs and even when they are alone they do not hesitate to attack a great white. These amazing creatures from the deep always use the same tactics: the killer whale launches towards the great white's side, clamping its massive jaws around the middle of the shark. It then tosses the badly bleeding creature into the air. Sometimes, if the shark is badly hurt enough for there to be no risk of an attack in mid-air, the killer whale will leap after it and grab it again just to show off. If the shark continues to thrash about, then the killer whale will grab it in the middle with its jaws (again) and clamp down as tight as possible. It will race through the water like this, shaking its head while the shark fops like a rag-doll, until its nemesis is dead.
  
  So there you have it, despite its fearsome reputation as king of the seas, the great white shark will always have another creature capable of killing it.

A great white shark feeding on a large school of fish.