Cidaroida (1) Clypeasteroida (1) Temnopleuroida (1) 1. Sea Urchin Embryo - A page from the Laboratory of Embryonic Gene Expression, included here for three beautiful photographs. 2. Sea Urchin Embryology - Laboratory modules using sea urchin eggs to explore fertilization and development. 3. Sea Urchin Extravaganza - Information on purple sea urchins and sea urchin fertilization. 4. Photos of Sea Urchins - Photos of Echinoidea from the Indo-Pacific, with text about behavior, habitat, and characteristics. 5. The Echinoids - Information about sea urchins, such as how they live, feed, and reproduce. There is also an alphabetic listing of their taxa. From The Natural History Museum, London.

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