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2. Sea urchins made to order: Scripps scientists make ... - AOL

   www.aol.com/news/sea-urchins-made-order-scripps...

   Consider the sea urchin. Specifically, the painted urchin: Lytechinus pictus, a prickly Ping-Pong ball from the eastern Pacific Ocean. The species is a smaller and shorter-spined cousin of the ...

3. Sea urchin - Wikipedia

   en.wikipedia.org/wiki/Sea_urchin

   Order Holectypoida. Sea urchins or urchins (/ ˈɜːrtʃɪnz /) are typically spiny, globular animals, echinoderms in the class Echinoidea. About 950 species live on the seabed, inhabiting all oceans and depth zones from the intertidal to 5,000 metres (16,000 ft; 2,700 fathoms). [ 1 ] Their tests (hard shells) are round and spiny, typically ...

4. Diadema antillarum - Wikipedia

   en.wikipedia.org/wiki/Diadema_antillarum

   Diadema antillarum. Diadema antillarum, also known as the lime urchin, black sea urchin, or the long-spined sea urchin, [2] is a species of sea urchin in the family Diadematidae. This sea urchin is characterized by its exceptionally long black spines. It is the most abundant and important herbivore on the coral reefs of the western Atlantic and ...

5. Echinocardium cordatum - Wikipedia

   en.wikipedia.org/wiki/Echinocardium_cordatum

   Spatangus arcuarius Lamarck, 1816. Spatangus cordatus (Pennant, 1777) [1] Echinocardium cordatum, also known as the common heart urchin[2] or the sea potato, [3] is a sea urchin in the family Loveniidae. It is found in sub-tidal regions in temperate seas throughout the world. [4][5] It lives buried in the sandy sea floor.

6. Red sea urchin - Wikipedia

   en.wikipedia.org/wiki/Red_sea_urchin

   The red sea urchin (Mesocentrotus franciscanus) [1] is a sea urchin found in the northeastern Pacific Ocean from Alaska to Baja California. It lives in shallow waters from the low-tide line to greater than 280 m (920 ft) deep, [2] and is typically found on rocky shores sheltered from extreme wave action in areas where kelp is available. [3] [4]

7. Psammechinus miliaris - Wikipedia

   en.wikipedia.org/wiki/Psammechinus_miliaris

   Psammechinus miliaris is a species of sea urchin in the family Parechinidae. It is sometimes known as the green sea urchin or shore sea urchin. It is found in shallow areas of the eastern Atlantic Ocean and the North Sea.