Sharks...
Are you Scared?
Beautiful and elegant are not words often associated with sharks, but they seem
appropriate for the sleek Blue shark. Its streamlined,
indigo-blue body seems to move effortlessly from the surface to the deep sea
that it favors. Its large pectoral fin and other appendages help with
navigation, but its secret to buoyancy is a giant, oil-filled liver. This makes
it easier for the shark to travel incredibly long distances. One tagged blue
shark traveled from New York to Brazil, a distance of over 3,740 miles.
Great hammerhead sharks look like oceanic bulldozers, with
their large mouths and strange hydrofoil-like heads that end with bulbous eyes
on either side of the “hammer” tips. The unique head is actually an evolutionary
adaptation that allows for superior water navigation. The largest of all
hammerheads, weighing up to 1,012 pounds, they may be found close to the surface
inshore as well as offshore to about 262 feet. Nomadic sharks, the great
hammerheads move throughout their very large range in response to rising or
falling water temperatures. The species favors coral reefs, which can supply
food as well as shelter although, aside from humans, this impressively large
denizen of the deep has few enemies.
The great white shark has both fascinated and frightened humans
since its ominous presence first became known. These powerful fish can kill a
person with a single bite, but not necessarily because they want to eat us.
Studies suggest surfers and flailing swimmers remind the great white of other
prey that it would normally go after. When presented with human dummies, the
sharks showed little interest. Nonetheless, each year one or more encounters
with a great white usually is reported in the U.S., since the shark's habitat
goes all the way from the surface down to well over 4,000 feet.