|Common Name: Rock-boring urchin|
|Coral reef in small crevices, in turtle grass beds, or under rocks and rubble in back reef lagoon areas.|
|North Carolina through Brazil, Panama Caribbean.|
|Natural History Notes|
|Individuals in Panama tend to spawn monthly when the moon is full. Individuals reach sexual maturity at 2 years, their gonads are ripe in late summer and early fall, and the embryo develops from fertilized egg to metamorphosed juvenile in 25 days.|
E. tribuloides is omnivorous and diet varies with locality. Stomach contents include: algae, bryozoans, coral fragments, gastropod shells, echinoid spines, sponges, turtle grass. 6,000-8,000 urchins washed ashore in a die-off on the NW coast of Puerto Rico in 1984-5.
|0-800m, but most commonly less than 50m.|
|Small number of solid, thick, brown, cylindrical spines arranged in 10 vertical series. Overall diameter, including spines, can reach 130mm. Ground color of the test is light brown to red-brown.|
|Lessios, H. A., Kessing, B. D., et. al. 1999. Phylogeography of the pantropical sea urchin Eucidaris in relation to land barriers and ocean currents. Evolution. 53(3): 806-817|
|In Bocas Del Toro|
|Reported By||Hendler, G.; Marine Invertebrate Taxonomy Workshop, Bocas del Toro, August 2003|
|Collin, R., M.C. Diaz, J. Norenburg, R.M. Rocha, J.A. Sanchez, A. Schulz, M.L. Schwartz and A. Valdes. 2005. Photographic identification guide to some common marine invertebrates of Bocas Del Toro, Panama. Caribbean Journal of Science 41: 638-707. |
Handler, G., Miller, J. E., Pawson, D. L. and P. M. Kier.1995. Sea Stars, Sea Urchins, and Allies. Smithsonian Institution. Pages:206-208.
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