PRESENTS:
Fallacious Shark Myths
Myth #5
SHARKS ARE NOT FOUND IN FRESHWATER.
FALSE: A specialized osmoregulatory system
enables the bull shark to cope with dramatic
changes in salinity -- from the freshwaters of some
rivers to the highly saline waters of the ocean.
Myth #4
MOST SHARKS CRUISE AT HIGH
SPEED WHEN THEY SWIM.
FALSE: Although some sharks may swim at
bursts of over 20 knots (23 miles per hour), most
sharks swim very slowly at cruising speeds of
less than 5 knots (5.75 miles per hour).
Myth #3
SHARKS HAVE POOR VISION.
FALSE: Sharks' eyes, which are equipped
to distinguish colors, employ a lens up to seven
times as powerful as a human's, and some shark
species can detect a light that is as much as ten
times dimmer than the dimmest light the
average person can see.
Myth #2
ALL SHARKS HAVE TO SWIM CONSTANTLY.
FALSE: Some sharks can respire by pumping
water over their gills through opening and
closing their mouths while at rest on
the bottom.
Myth #1
SHARKS HAVE PEANUT-SIZED BRAINS
AND ARE INCAPABLE OF LEARNING.
FALSE: Sharks' relatively large and complex
brains are comparable in size to those of
supposedly more advanced animals like
mammals and birds. Sharks also can
be trained.
TheSharkDoctor
www.thesharkdoctor.com
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