What distinguishes fish from the other animal classes?
Fish are a class of aquatic vertebrates. The
combination of gills, fins and the fact that they live only in the water
make fish different from all other animals.
Some fish are beautiful... Photo Source:
Corel Web Gallery
And some...not so much. Photo Source: Corel
Web Gallery
Fish spend all of their lives in the water and are
cold-blooded with the exception of Tuna family and the Mackerel shark
family.
Yes! A seahorse is a fish. Photo Source:
Corel Web Gallery
Lion Fish or Scorpion Fish Photo Source:
Corel Web Gallery
Scientists believe that
there are more than 24,000 different species of fish in the
world.
The Whale Shark is the largest member of the fish family. Photo Source: Corel Web Gallery
They range in size from the largest, Whale shark at
16 m (51 ft) long, to the smallest the 8 mm (1/4 in.) Stout Infantfish.
Shark skeletons are made of cartilage not bone. Photo Source: Corel Web Gallery
Most fish have a skeleton made of bone but some,
like sharks, have a skeleton made of cartilage.
