Sea Urchin

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Sea Urchin Development from Eggs

This is a light microscope photograph of sea urchin eggs after they have been fertilized. You can see the eggs surrounded by a layer, called the jelly layer. The light dots are the sperm. The eggs look blue in color, because of the microscope light. 

urchin eggs



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Young sea urchins

These are baby purple sea urchins called juveniles. Adult Strongylocentrotus purpuratus grow as big as a human fist. Image courtesy of Nancy Mozingo.

Sea Urchins Do Research

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