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About All Sharks - Term Papers

About All Sharks

SHARK FAMILIES: There are more then 350 know species of sharks today, which can
all be placed under 8 scientific orders that contain 30 families. They are
placed into these categories by their shared characteristics, this is called
taxonomy. The more closeley related species are placed in another family in the
order.

SQUAINIFORMES: The angel shark as they are commonly known are
characterized by their RAY like flattened bodies. This order has one family
which is called SQUATINDAE that contains about 13 species. The maximum size
that can be attained by any one of these species is 4-6 feet in length.

PRISTIOPHORIFORMES: These shark are known as the saw shark. This order has only
has ...

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by their six or seven pairs of gill slits, there sharks can often
be found in deep water. The frilled shark (CHLAMYDISELACHUS ANGUINEUS)
who's appearance is quite unmistakable due to it's "eel" like appearance, is
perhaps one the strangest shark that exist today.

FOSSIL RECORD: Shark fossil record is fargmentery at best. Most fossils found
so far consist of nothing but teeth in some cases a few vertebra have been
found. This is rare due to the fact that sharks have bones instead, they have
cartiladge which countrary common belief is rather solid. In the rarest of
cases complete fossil have been discovered. Scientific data shows that
following a period of great physiological changes. There was not to many
changes in the sharks fossil in the millions of years, of studying the shark
fossils. The Hybodonts who made their appearance some 320 million (years ago the
age of the dinosaurs) where quite common through out both oceanic and fresh
water. Due to reasons ...

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About All Sharks. (2005, March 3). Retrieved November 20, 2024, from http://www.essayworld.com/essays/About-All-Sharks/23103

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PAPER DETAILS

Added: 3/3/2005 02:57:24 AM
Category: Science & Nature
Type: Free Paper
Words: 761
Pages: 3

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