Ecophysiological investigation of sexual and asexual reproduction of the giant jellyfish Nemopilema nomurai.

巨型水母Nemopilema nomurai通过有性和无性繁殖。在有性繁殖中，水母从6月下旬开始在其胃腔中发育性腺。从7月下旬开始，性腺开始出现卵母细胞或精子卵泡，卵母细胞数量增加，到11月每只雌性的卵母细胞数量达到数亿个。水母受到物理损伤后，卵母细胞和精子卵泡的成熟迅速进行，并得到专门的性腺上皮细胞的支持，这些细胞将营养物质从胃腔转移到卵母细胞和精子卵泡。无性生殖通过由息肉形成的休眠足囊进行。足囊储存碳水化合物、蛋白质和脂质，以维持其休眠数年。

The giant jellyfish Nemopilema nomurai reproduces through sexual and asexual processes. In the sexual reproduction, medusae began to develop gonads in their gastric cavity from late June. Oocytes or sperm follicles appeared in the gonads from late July, and the number of oocyte increased and attained several hundred million per a female in November. Maturation of oocytes and sperm follicles rapidly progresses after medusae are physically damaged and are supported by the specialized gonadal epithelial cells which transfer nutrients from the gastric cavity to oocyte and sperm follicle. Asexual reproduction is carried out via dormant podocyst formed by a polyp. Podocyst stores carbohydrates, proteins, and lipids to maintain its dormancy for several years.