Saturday, August 11, 2012

Hiu-Hiu nan Cantik

Bagi sebagian orang, penyelam, ilmuwan dan orang-orang yang nongkrong di pantai, hiu adalah kenyataan setiap hari dalam setahun. Orang telah lama takut terhadap predator yang berkeliaran di dalam laut dan beberapa spesies hiu diburu hingga jumlah mereka terancam. Hiu memang mempesona dan mengisi kita dengan rasa takut, jadi inilah beberapa foto hiu secara close up, seperti hiu putih besar, hiu martil, hiu macan, hiu banteng, hiu paus, hiu lemon, hiu perawat abu-abu, dan hiu-hiu lainnya. . . semua ditaburi dengan beberapa fakta tentang hiu.

When you see sharks, like this Jaws type, wouldn’t you get out of the water?

This sharptooth lemon shark (sicklefin) in Australia almost looks like it is smiling. This species grows to about 10 feet (3 meters), but they don’t move off to deep water until they are about 12 – 15 years old.

The hungry predator, a great white shark. While there are about 30 to 50 shark attacks reported yearly, only 5 to 10 are fatal. Despite all the movies showing sharks attacking and eating people, it is rare to be bitten by a shark and even more rare to die from a shark bite.

A deadly great white bite with rows of 300 sharp and serrated triangular teeth.

Great white shark jumping out of water to chomp down on a seal. This fast leap out of the water is called breaching; great whites use their speed and the element of surprise to catch prey. Then they don’t chew, but rip off chunks of meat and swallow it whole.

Adrenaline junkies in a cage, baiting a biting shark. Daredevils divers probably don’t holler out for Mommy!

Shark, the predator. If you were to believe the movies, the headlines, you might believe you had a good chance of being bitten by a deadly and aggressive shark. However, you are more likely to be bitten by another human than by a shark. In fact, you have a bigger chance of dying from a bee, wasp or hornet sting as well as from a dog bite than the chance of being killed by a shark bite

Scuba divers measuring a sand tiger shark which has an average length of 9.8 to 11.2 feet (3.0 to 3.4 meters). Interestingly enough, these sharks are cannibals even before birth since the most developed embryo will feed upon its siblings in the womb. Only the strongest survive due to this a reproductive strategy of intrauterine cannibalism.

Great white shark attacks.

Great White at Guadalupe Mexico. The great white is not the largest shark, but is the biggest predatory fish on Earth. Most reach about 15 feet (4.6 meters) in length, but some grow to more than 20 feet (6 meters) and can weigh 5,000 pounds (2,268 kilograms).

Most sharks have sandpaper-rough skin, but this silky shark has smooth skin. They are most often seen deep in tropical waters at a depth of 164 feet (50 meters).

Whale Sharks are an average of 40 – 46 feet long and can weigh 66,000 pounds (30 tons). This gorgeous shark species must reach an age of 30 years before it’s old enough to reproduce. They can live for about 60 – 100 years, but are considered a threatened species since they cannot reproduce fast enough to keep up with overfishing.

“The Gathering.” Now that’s a lot of sharks!

A shark’s flesh is made up of between 30 and 80 percent of water

Hammerhead shark, Cocos Island, Costa Rica. This species usually swim in schools during the day, but are solitary at night. There are nine known species of hammerheads which range from 3 to 20 feet (.9 to 6 m) in length and weigh from 500 to 1000 pounds

Translation as follows: ‘The shark week’ under the sea revives one of the largest predators of all time, the ancient Megalodon. It was a real monster, whose length reached 16 meters and weight up to 45 tons. It was the size of a humpback whale, but it was far from peaceful in nature. Two meters wide, its mouth was nearly two and a half feet high. His bite was stronger than T-Rex or any other creature in the Earth’s history.” This was a reconstruction to test the hydraulic shark jaw which could deliver a bite meaner than a million years of other sea monsters.

The beautiful sand tiger shark likes to live close to sandy beaches, thus they were named sandy tiger sharks. This species is threatened and categorized as vulnerable.

Bull sharks with scuba divers. This shark species is agressive and can survive in saltwater and freshwater. It is responsible for most shark attacks reported near shore, including many which were first blamed on great whites. It can travel far up river and bull sharks have even been found in rivers within Indiana and in the Ohio River.

At the Georgia Aquarium there are four whale sharks, two males called Taroko and Yushan, and two females named Alice and Trixie.

Great Hammerhead shark. Of the nine hammerhead species, only three are considered dangerous to humans.

This was labeled as a Megalodon Shark, but that is impossible since they are long extinct. Just the same, it appears humongous when compared to this boat. If it is an adult great white shark, then it can swim up to speeds of 43 mph.

Great White’s sharp jagged teeth from the side. Every year there are more than 100 shark attacks worldwide. Great white are responsible for about 1/3 – 1/2 of those attacks. Most are not fatal as curious great whites partake in “sample biting” and then release rather than preying on humans victims.

A Leopard shark swimming in a kelp forest in the 70,000 gallon kelp tank at Scripps Aquarium in La Jolla, California.

Gray Nurse Shark. This species can grow to 14 feet (4.3 m) and weigh about 730 pounds (330 kg). Just as sharks have an incredible sense of smell for blood, so too do they have amazing hearing. It is believed that sharks can hear their prey from miles away.

This strange-looking shark is a big Basking shark. It’s the second largest living fish, after the whale shark. The basking shark is regarded to be a threatened species, listed as “vulnerable.” The largest ever recorded was 40.3 ft (12.27 m) long. NOAA reminds us that, unlike the Discovery Channel, every week is Shark Week for NOAA.

Dharavandhoo Thila – Hanifaru Bay Sharks. Shark pups are born fierce, but it’s a shark-eat-shark world even before they are born. As some shark species develop teeth as embryos, they eat their unborn brothers and sisters until one dominate shark remains. Even stranger, there is such a thing as virgin shark birth since not all female sharks need a male to conceive. This is called parthenogenesis

Sharks in shallow water. Sharks have an intense sense of smell and some species can detect even the tiniest amount of blood in seawater . . . as little as one part per million of blood in the ocean. They can hone on it and use the scent of blood as a directional beacon in the water.

Meanwhile in Istanbul Akvarium . . . “The other day around the corner.”

Man stalks whale shark, great white shark stalks man. Although it might scare the crud puppies out of you, it is a mostly a myth that sharks attack surfboards. However “the great white does appear to look at silhouettes from below.” The shape of some surfboards may “fool the sharks into believing they are viewing a pinniped, such as a seal, walrus or sea lion.” You are supposed to take comfort in the fact that “far more surfers drown or die from other causes each year.”

Surfacing Great White Shark. A great white is born a predator along with about 12 other shark pup siblings. In fact, a mother shark may immediately prey and feed on her babies. Many shark pups don’t survive their first year, even though great white sharks are about 5 feet long (1.5 meters) at birth. They can grow up to three times as long as an adult.

Lemon shark with “buddies” hanging on.

Smiling Great White Shark

Megamouth sharks have gigantic heads and mouths which seem to always be a bit turned down as if they might be frowning. Megamouths are extremely rare and dwell only in deep water. They grow to a length of about 18 feet.

Tiger shark at Tiger Beach.

Basking Shark with divers. Though truly bizarre in appearance, looking like some kind of sea monster, basking sharks are slow moving and usually harmless filter feeders.

Lemon shark snapping at the surface

Beautiful beast, a whale shark. Despite their huge size and being active feeders, whale sharks are not considered a danger to divers. There was a report, however, of a diver nearly being sucked into a whale shark’s mouth before escaping shaken up but unharmed

Diving the deep blue with an aggressive predator, a sand tiger shark.


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