Page 52 - Wonderful Creatures: Children! Have You Ever Thought ?
P. 52
WONDERFUL CREATURES
if we stay in water for a while; if we stay for a longer time then it
suffers injury. But this never happens to a fish. This is a result of a
stiff bright layer in its outer skin. This layer prevents water from
entering its body. If fish did not have this layer, their bodies would
be damaged, and since water would enter the body the balance
inside would be disturbed and they would eventually die. However,
these things do not happen and all fish continue to live their under-
water lives.
The picture on the right shows the
remains, in other words a fossil, of a
fish that lived a very long time ago.
Another member of the same speci-
es, one that is still alive today.
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