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較 Reading _貴半 myon 2
44 Visitors may sometimes Wonder why aquariurms are uSually dark inside. They 。。
oe important reasonS.
this way for several inp
中 45 When sea animals and fish live in natural environments, they usually experienc。
slow changes in licht. The light from the sun and the moon changes how they act. For
example, fSh sleep When it is dark and are active when it is jipht. However sea turtles
wl only Iay eggs at might. They will not do this in any bright places.
因 46 Fish may be surprised 潤 the light changes suddenly, However if there is no
change in the jight, they may not sleep and then の feel stress. They may swim to the
bottom of the fish tank, or even try to jump out.
叶 4
It is necessary to think about changes in light When a new aquarium is built.This
1S why aquariums choose jighting systems carefully, の The best aquarium lighting
SysStems copy the slow movement of the Sun across the sky Aquariums use these
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