The dangerous Bull shark

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The dangerous Bull shark

Postby Mike Brooks » Tue Nov 18, 2008 3:55 pm

There are 375 species of sharks and they all belong to a class of fish called Chondrichthyes. Only 30 species of sharks have been reported to ever attack a human.

According to the Florida Museum of Natural History, “The shark species responsible for most unprovoked attacks on humans are the white (Carcharodon carcharias), tiger (Galeocerdo cuvier), and bull (Carcharhinus leucas).”

Characteristics of the Bull Shark
The Bull Shark has small eyes, a short nose, husky grey body, off-white under belly, and a long tapered back fin. Its teeth are triangular and very sharp. It will eat almost anything but its favorite prey is other sharks, turtles, and dolphins. The female Bull Shark is bigger than the male. The female grows to 11.5 feet long and the males grow to 7 feet long.

Habitat of the Bull Shark
The Bull Shark is most commonly found in warm ocean waters near land. Unlike other sharks, it can also live in freshwater rivers, lakes, and in streams if they are deep enough for the shark to get through. Some Bull Sharks have been found in depths of 150 meters but it does not usually swim below 30 meters.

It is estimated that there are more than 500 bull sharks in the Brisbane River, and greater numbers in the drainage ditches or canals of the Gold Coast in Queensland Australia. The Bull Shark has been reported 2200 miles up the Amazon River in South America. It has been found in the Mississippi River as far north as Illinois.

Even stranger, the Bull Shark has been found in cooler waters in Lake Michigan. After Hurricane Katrina, large numbers were found in Lake Ponchartrain. It has over taken many rivers in eastern India and survives quite well in Lake Nicaragua.

Scientists, up till the 1970s, thought that the Bull Sharks in Lake Nicaragua were of a separate species because it was thought that there was no way these fish could have entered the lake. It was discovered that these sharks were found jumping up the rapids just like salmon. The Bull Sharks that were tagged in the lake were caught later out in the ocean.

About Shark Attacks
According to Vinnie La Sorsa at All Explore,"Almost 95% of shark attacks happen in 6 feet of water or less. Attacks are almost always in areas where water clarity and visibility are poor. When water clarity is poor, sharks rely on their senses rather than eyesight. A shark’s mouth is its only way of feeling any object.”

An interesting fact about Bull Sharks is that when they are in fresh water, they will urinate 20 times the amount of a Bull Shark living in salt water.
Trust in the Lord with all your heart, and lean not into your own understanding, Proverbs 3:5
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Mike Brooks
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