|Why do we put fish inside the containers with the
|Question Date: 2019-05-16|
There are both philosophical and scientific
aspects to this interesting question! People keep
fish inside of containers for a variety of
reasons. Some people do it to keep fish as
pets, and others to farm fish for food. Either
way, fish need to be kept in water.
Fish naturally live in water and have evolved to
obtain their necessary nutrients and chemicals in
an aquatic environment. Even though they need
oxygen, fish cannot breathe air directly, as we
and many other animals do. Instead, they gulp
oxygenated water and pump it through their
gills. The oxygen in the water diffuses
into the deoxygenated blood in the gills. The
newly oxygenated blood then gets circulated to the
rest of the fish's body, and the deoxygenated
water that's left over filters through the gills.
People like to look at the fish, so they
put the fish in fish bowls or fish tanks with
water, or maybe salt water, if the fish are salt
Fish are aquatic animals. They live in water. The
water that they live in is liquid. However, it's
liquid water, not some other liquid substance,
that fish live in. If you were to put a fish into,
say, gasoline, which is also liquid, the fish
would die very quickly.
Great question. Humans, like me and you, are
mammals that need to breathe air. We breathe air
because it has oxygen in it, which our body needs
to function every day. Fish need oxygen too, but
they get it through breathing water. We put
fish in containers with liquid water because that
is their habitat and has been for hundreds of
millions of years!
Fish evolved so that they have things called
gills instead of lungs. If a fish were
taken out of water, the gills wouldn’t be able to
get the oxygen and the fish would not survive. It
would be like if me or you were put underwater…
our lungs would not be able to get the oxygen and
we would not survive!
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