Name:   Cyananthea hydrothermala
Reference:   Doumenc D. A. and Van-Praët M., 1988, Page 66   , fig. 4
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Caption:   "Electron micrograph of a mesenterial filament of *Cyananthea* with a few secretory cells containing rough endoplasmic reticulum and zymogen granules (Z). N: nematocyst showing butt. F: apical flagellum." Reprinted with permission of Elsevier Science.