What Kind of sharks are there?
Most sharks are fish eaters and have powerful, streamlined bodies to help them
swim and catch their prey. There are over 350
species of sharks. Some are just six and a half inches long and others
are over 40 feet long. Sharks have the same five senses as people, hearing,
smell, sight, taste and touch. Sharks can detect vibrations made by animals
moving through the water. Their sense organ is called the lateral-line and runs
from the head to tail of the shark. Light only penetraits a short distance
beneath the surface of the ocean. For this reason vision is less important than
the other senses for aquatic animals. Sharks see
well and may have color vision. They don't rely on sight as much as
people do. Sharks have a sixth sense that
lets them detect weak electrical signals from their prey. These electrical
pours are on their head.
There are more safe sharks than there are
dangerous sharks in the ocean. Some are huge but gentle like the
whale shark and the basking shark. These giant sharks eat
plankton. Some sharks are tiny and look like tropical fish like the
zebra horn shark
Only 32 shark species have ever been known to attack people. Of these the most
dangerous is the hamerhead, bull shark, tiger
shark, and the great white shark.
Very little is known about the great white
shark as well as the hamerhead shark.
All sharks can replace their teeth when
they fall out. Another tooth will grow
back in as little as a day. Many sharks have loose
jaws so they can reach out to the prey. A shark bite can have as up to
18 tons of pressure per square inch.