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Nemopilema nomurai
Nemopilema nomurai Kishinouye, 1922
Nomura's jellyfish
Nemopilema nomurai
photo by Choi, Jong-Kwan

Family:  Rhizostomatidae ()
Max. size:  200 cm WD (male/unsexed); max.weight: 200 kg; max. reported age: 1 years
Environment:  pelagic; marine; depth range 0 - 176 m
Distribution:  Northwest Pacific: endemic to the East Asian Marginal Seas.
Diagnosis:   
Biology:  One of the largest jellyfish species (Ref. 3010). Occurrence of jellyfish bloom has threatened the fisheries in Japan since early 2000s, possibly because of global warming - note that the growth of medusae are dependent on high temperatures (Ref. 100320). Occurs in semi-enclosed basins of marginal seas (Ref. 122853) and also found offshore (Ref. 122855). Before the chitin-covered podocysts develop into adults, they remain dormant for at least 6 years. Jellyfish blooms occur by mass excystment of these podocysts upon exposure to high temperatures (Ref. 100312).
IUCN Red List Status: Not Evaluated (N.E.) Ref. 123251)
Threat to humans:  harmless
Country info:   
 

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