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Presentationstudent 9-A classAlyona Bondar


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Starfish


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Starfish - interesting and mysterious animal.


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Starfish - a veteran of the seabed, it appeared over 450 million years ago.


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It belongs to a class of echinoderms.


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From the outside it is covered with short needles or pins.


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Every ray of starfish, being separated from her body, it is viable and quickly regenerates.


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Sea stars are voracious predators, although there are exceptions in the form of herbivorous species feed on algae.


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Some starfish even able to dig up prey that is hiding in the sand.


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Life starfish can reach 30 years.


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At present there are about 1,600 species of sea stars.


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