Are Whales and Dolphins Marine Mammals or Fishes?

As a teacher myself who used to teach Science tocalf is born; the mother will push it to the surface to
junior school students for years, I have seen a lot ofallow it to take its first breath of air.
confusion about whales and dolphins and even someAnother difference is the fact that dolphins and whales
frustration concerning their classification.have a skeleton made of bones contrary to fishes
What is the fuss all about? The frustration is basicallywhich have theirs made of cartilage. Also, most fishes
coming into play when confused people talk aboutgive birth to their babies by laying eggs then having the
both dolphins and whales as being fishes so whenmale fertilize them. Later on, the babies are on their
they are being corrected about it, they tend to hate it.own.
According to them, what lives in the water must be aThe exception to the rule of laying eggs is the shark.
fish otherwise it wouldn't be there. Isn't that right?You see, sharks likes the great white shark are
Wrong!actually giving birth to several live pups but as soon as
The fact and the matter is that fishes like the greatthey are born, they must fend for themselves. Marine
white shark and marine mammals such as dolphinsmammals such as whales and dolphins giving birth to
and whales are not under the same classificationusually one calf, nourish them with maternal milk, raise
simply because of the way nature created their body,them to maturity and teach them all they know to help
the way it functions and differentiated their needs asthem learn how to eventually fend for themselves.
well.When dolphins and whales are born, the have a thin
You see, fishes have gills and take their oxygenlayer of hair covering their body. Fishes will be covered
directly from the water while marine mammals mustwith either scales or a rubbery type of skin such like
go to the surface approximately every 30 minutes tothe one found on the great white shark.
inhale oxygen from directly from the air and get rid ofAs you can see, there is no way that dolphins and
the Carbon Dioxide using their blowhole otherwise theywhales are fishes like the great white shark. There are
would drown. This process takes only a few secondsimportant differences.
but is necessary for their survival. This is why when a