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

Figure H6-1. Reproductive system. (a–b) Adult ovary specimen collected in spring season (March), exhibiting some degenerative changes and phagocytosis indicated with occurrence of brown pigmented cells. (c–d) Another example of adult ovary specimen collected in spring, exhibiting degenerative changes and atresia. (e–f) Adult testis specimen collected in spring season (April). (g) Juvenile immature ovary collected in fall season (September). (h) Juvenile immature testis collected in fall season (September). Mel = melanin pigments; NR = nutritive phagocytes; Oo = oocytes; Sptd = spermatids.

Credit: Yasunari Kiryu, FWC/FWRI