Figure 6.

Laboratory culture of T. cystophora. (A) planulae obtained from adult female jellyfish after one day of culture in artificial sea water. (B) the formation of attached polyps with two or three tentacles 48 hr after incubation at 21°C. (C) Primary polyps with attached daughter polyps. (D) A polyp undergoing metamorphosis in process of formation of rhopalia containing the eyes. (E) Young ephydra released about an hour previously from metamorphosing polyp. (F) Rhopalia in paraffin embedded section stained by hematoxylin/eosin. Note the retina (R) and the lens (L). Bar = 100 μm (A and B), 200 μm (C), 500 μm (D), 800 μm (E), and 60 μm (F).