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Unfertilized starfish egg
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Fertilized starfish egg and first cleavage
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2 cell stage
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Starfish bipinna
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Starfish blastula
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starfish Brachiolaria larva
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Early starfish gastrula
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Fertilized starfish egg
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Late gastrula and bipinnaria larva
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Pigmented cortex
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Blastacoel
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Area of gray crescent
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Nuclei
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Vitelline membrane
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Shrinkage spaces
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