Page 152 - The Microworld Miracle

Under normal circumstances jellyfish feed on
small fish. In seas where food is scarce, however,
their only food source is algae. They way they
recognize and store these in their bodies as a
food depot is literally conscious behavior.

a way that every one can see the sunlight. In short, wherever the
Sun is, there the jellyfishes are, to obtain the energy necessary to
nourish themselves by means of photosynthesis. In darker waters
that do not receive sunlight, no trace of jellyfishes can be found. As
THE MICROWORLD MIRACLE in. When darkness falls, they feed on nitrates they produce them-
the Sun sinks, the jellyfish come to the centre of the water they are

selves or find in the water.
In order to do all these extraordinary and completely rational
things, jellyfish have been equipped with sense organs capable of
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detecting light at high and low concentrations. These enable them

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