Page 67 - Shark

JH000

Shark skin has been used to buff 280mm x 216mm PMU Q4 v5 UK Edition
marble to a high shine and to give
a smooth finish to wood.

Game fishermen often
release sharks after they
catch them.

In some shark species, the female
continues to produce eggs when
she’s pregnant, and the developing sharks
eat them. With the sand tiger (gray nurse
Thresher shark shark), the first pup to develop in each Reef sharks feeding on surgeon fish
uterus consumes its developing siblings.
After mating, some female sharks Some kinds of shark are fussy
can retain the male sperm in their eaters; they sometimes take a
bodies for use when they are ready to A shark is able to detect sample bite out of their prey—or just sink
reproduce—even if that doesn’t happen an electrical field of only their teeth in to get a taste—before they
until the next season. 100-millionth of a volt. begin to feed properly. If they don’t like the
taste, they will spit out the bite and move on.

Some species of shark can detect There are only a few records
light one-tenth as bright as the of sharks getting cancer. This When there’s a large quantity of
average person can see. Deep-water sharks has led to studies in the hope of finding food available, sharks will gather
have especially large eyes to help them anticancer substances in shark cartilage around it in an uncontrolled feeding frenzy,
penetrate the gloom. and other tissues. However, taking during which they will bite anything that
ground-up shark cartilage is unlikely comes near, including each other.
to have any benefit.
The hammerhead’s mouth is
located under its head.
One of the latest
antishark devices is a
battery-operated machine
designed to fasten onto water
craft (including surfboards)
and send out electrical
impulses. These cause enough
distress to approaching sharks
to repel them.

Brain-to-weight ratios
suggest some kinds of
shark are of similar intelligence to
birds and mammals. Sharks can
be trained in exchange for food
rewards; lemon sharks were trained
to push a target with their snouts
and nurse sharks to bring rings. Hammerhead shark
The hammerhead shark eats
stingrays, swallowing them whole
in spite of their poisonous spine. If the
sting becomes embedded in the shark’s
Pectoral fin jaw, its teeth may grow abnormally.

Sharks prefer to prey on injured
or diseased weakened creatures
than on strong ones that will fight back.
Sharks are also scavengers. The great white
sometimes feasts on whale carcasses.

Sharks can easily mistake
Bluish-gray color reflections from metal or sparkly
Great white shark
for camouflage stones for the sheen of fish scales. Don’t
wear jewelry when you’re swimming where
sharks have been seen!
In order to feed, cookiecutter
sharks travel from the bottom of Shark liver oil contains squalene,
the sea to the surface—a round trip of over which is used in cosmetics and Artificial skin from shark cartilage
4 miles (7 km). alternative medicine. has been used to treat burns.

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