16. Topic: White Shark
From: http://mrnussbaum.com/readingcomp/sharkscomp/
Date: 2014, October 14
The Great White Shark is the largest
predatory shark, and is probably the most well-known and feared shark. The
Great White Shark is gray or bluish above and white below. The largest Great
Whites can reach lengths of 22 feet and weigh up to 5,000 pounds. Most are
between 13 and 16 feet and weigh 1,500-2,400 pounds.
The Great White has massive teeth,
which are positioned in rows and serrated. When the Great White attacks, it
bites its prey and shakes it head back and forth. The serrated teeth act as a
saw and literally tear the victim apart. The Great White Shark often swallows
many of its own teeth in an attack.
The Great White Shark normally feeds
on fish, seals, dolphins, porpoises, otters, and turtles. It is thought to
locate its prey by electrosense and by smell. Like all sharks, Great Whites
have special pores called Ampullae of Lorenzini, which enable them to detect
the electromagnetic fields radiated by moving organisms. Great Whites can
detect voltage as small as one half billionth of a volt.
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