Starfish Development
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Kingdom: Animalia

    Phylum:  Echinodermata

        Class:  Echinoidea

The sea star, or starfish, shows a rather typical development sequence for an animal with an isolecithal egg (shown here through the gastrula stage)

 

 

starfish develpment b.jpg (92413 bytes)Egg

 

 

starfish development.jpg (80553 bytes)4-cell stage

 

 

starfish blastula b.jpg (115667 bytes)Blastula

 

 

starfish development b.jpg (132132 bytes)Early gastrula

 

 

starfish gastrula.jpg (151125 bytes)Gastrula

 

 

starfish development composite.jpg (96732 bytes)Assorted stages of development

 

 

 
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