Western Australia Shark Attack: Great White Bites Surfer Benjamin Charles Linden In Half

in the trash & took it home. After reading about great whites in Mass. & sharks chasing canoes I gave it to the neighbors. (yesterday & if I had not It would be gone now!).

I'd rather be doing 130 mph on my m/c than be in water deep enuff for sharks.

I like em, just don't want to feed them.

So.....don't like the neighbors too much, do ya?

Does the underside of the boogie board have the silhouette of a seal painted on it?

They had several of them leaning against the garage door & I figured they were using them.

Besides that, I fractured my skull & was brain dead for 2-3 days in January & did not feel like hitting my head on the sand w/o a dot/snell rated helmet. no more rollarblades with the dog or even alone & bicycle helmets are not good enuff for me.

This thing was plastic coated w/ a ankle thingy & I will never throw anything into a landfill that anyone could use.

I also left a phone message stating it was too dangerous for me & good luck.

BTW all the lawnmowers I ever needed were pulled from trash & 90% of them ran with just adding gas.

Mostly because of the large population of sea lions, and seals, there is also a large number of Great White Sharks, near the Farallon Islands. http://en.wikipedia.org/wiki/Red_Triangle_%28Pacific_Ocean%29


http://en.wikipedia.org/wiki/Farallon_Islands

Most of the local scientists have stated that a surfer on a surf board from below could appear as a giant seal. This of course, they speculate might be the reason for a Great White attack.

They find prey with highly developed sense of smell and ability to sense vibrations in water.

Shark Eyesight

Sharks have such keen senses that enable them to detect even small amounts of electric current or vibrations (electroreception) and chemical changes in the water (chemoreception). These senses are so acutely specialized that it was assumed that they overcompensate for sharks’ poor vision.

Sharks' eyes are built just like ours

In the late 1960s, researchers discovered that shark eyes have duplex retinas, or retinas containing both rod and cone cells. Rods enable the shark to see light and darkness, while cones allow for the detection of color (though scientists are still unsure how sharks interpret colors). The eye structure of a shark is similar to other vertebrates in that it contains a cornea, lens, retina, pupil and iris. Given their similar structure and usage, shark eyesight works similarly to that of humans.

Sharks can see even in dark or murky water

Unlike humans, shark eyes are equipped with a tapetum lucidum, a layer of mirrored crystals located behind the retina. This provides a means for light that initially escaped detection to be detected as it is passed through the retina a second time. This process defocuses light, reducing acuity but increasing sensitivity. That is, at least you can see, but you don't see as clearly as you would if more light were available and you didn't have to use a tapetum. Such an adaptation enables sharks to see even in dark or murky water and up to ten times greater than humans in clear water. Whereas human eyes are adapted only for land and cannot see in the water, sharks have keen eyesight in the water and may even see out of water.

Sharks' eyes are protected when attacking prey

Also unlike humans, shark eyelids serve to protect the eye when attacking prey. Some sharks have a nictating membrane, or a clear membrane that covers and protects the eye when a shark bites its prey. Sharks like the Great White, lacking a nictating membrane, roll their pupils back in their heads for protection when feeding.


**last line:Despite their vast sensory abilities, sharks still rely on eyesight when seeking food, therefore, their eyesight is as keenly adapted to their environments as their other senses.

more..http://www.sharksavers.org/en/education/biology/myth-sharks-have-poor-vision1/