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VM244: Diagnostic Methods for the Comprehensive Health Assessment of the Long-Spined Sea Urchin, Diadema antillarum

Figure 13. Horizontal stripes on spines of a small sea urchin. This observation is supposed to be definitive of a juvenile animal. Our observations suggest that some animals with striped spines have what appear to be mature gonads.

Credit: R. Francis-Floyd, UF/IFAS