Astrohydra japonica Hashimoto, 1981



Taxonomy & Nomenclature



Conservation Status

Last record: 1985

Since rediscovered



Nomorinoike, Shizuoka Prefecture, Japan


Biology & Ecology










Original scientific description:

Hashimoto, Hiroshi. (1981). A new fresh-water hydroid, Astrohydra japonica. Annotationes Zoologicae Japonenses 54(3): 207-212.


Other references:

Hashimoto, Hiroshi. (1985). Medusa of Fresh-water Hydroid, Astrohydra japonica Hashimoto. Zoological science 2(5): 761-766. [Abstract]

Cheryl Lewis, Masao Migita, Hiroshi Hashimoto and Allen G. Collins. (2012). On the occurrence of freshwater jellyfish in Japan 1928–2011: eighty-three years of records of mamizu kurage (Limnomedusae, Olindiidae). Proceedings of the Biological Society of Washington 125(2): 165-179. [Abstract]

Peterson, Miles I et al. (2022). A description of a novel swimming behavior in a dioecious population of Craspedacusta sowerbii, the rediscovery of the elusive Astrohydra japonica and the first genetic analysis of freshwater jellyfish in Japan. Plankton and Benthos Research 17: 231-248.


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