- Enchanted Learning: Sea Urchin
 - Sea urchin colouring page printout. Designed to teach kids about the spiny, hard-shelled animal that lives on the rocky seafloor, from shallow waters to great depths. - Sea Urchin Embryology
- Drama of fertilization and development is explored by laboratory modules using sea urchin eggs.
- Sea Urchin Embryology Tutorial
- Examines the fertilization, cleavage, gastrulation, and patterning processes.
- Special Online Collection: The Sea Urchin Genome
- Science Magazine describes the sequencing of the genome of the sea urchin Strongylocentrotus purpuratus and initial insights obtained from the sequence.
- The Sea Urchin: Special Interactive Poster
- Offers a closer look at some of the insights gained into cell biology, developmental biology, and gene regulation from the study of the sea urchin. From Science Magazine.
- UrchiNet
- Database containing information on function and regulation of genes controlling development in the sea urchin Strongylocentrotus purpuratus.
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