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Rhizostomatidae - - Classification -
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Nemopilema nomurai Kishinouye, 1922
Nomura's jellyfish| Native range | All suitable habitat | Point map | Year 2050 |
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| This map was computer-generated and has not yet been reviewed. |
| Nemopilema nomurai AquaMaps Data sources: GBIF OBIS |
![Image of Nemopilema nomurai (Nomura\](/images/thumbnails/jpg/Tn_Nenom_u0.jpg "Image of Nemopilema nomurai (Nomura\")
Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS
Scyphozoa | Rhizostomeae | Rhizostomatidae
Environment: milieu / climate zone / depth range / distribution range Ecology
Pelagic; depth range 0 - 176 m (Ref. 122799). Subtropical; 52°N - 29°N, 117°E - 142°E (Ref. 121705)
Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions
Northwest Pacific: endemic to the East Asian Marginal Seas.
Length at first maturity / Size / Weight / Age
Maturity: Lm ? range ? - ? cm Max length : 200 cm WD male/unsexed; (Ref. 99323); max. published weight: 200.0 kg (Ref. 3010); max. reported age: 1.00 years (Ref. 100320)
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).
Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Life cycle: Fertilized egg develops into a planula larva after 1 day. Planula swims for 4 to 8 days until it becomes a translucent, whitish and dome-shaped scyphistoma and settles at the bottom. Becomes a fully-developed scyphistoma after 10 to 20 days of settlement. Also exhibits asexual reproduction by means of podocyst formation (as many as 18 podocysts on a single original scyphistoma within 7 days to 3 months). Scyphistoma colony develops from podocyst of original scyphistoma within 6 months at 18°C. Fully-developed scyphistoma develops into a strobila after a day and becomes a liberated ephyra with 5 to 7 days. Becomes a fully-developed metaphyra within 30 days of post-liberation and becomes a young medusa within 40 to 50 days of post-liberation (Ref. 3004). Furthermore, ephyrae are released into the plankton during early summer. After subsequent sexual reproduction, the medusae die during winter. The life span of the medusae is less than a year (Ref. 100320).
Main reference
References | Coordinator | Collaborators
Kawahara, M., S.-I. Uye, K. Ohtsu and H. Iizumi 2006 Unusual population explosion of the giant jellyfish Nemopilema nomurai (Scyphozoa: Rhizostomeae). Mar. Ecol. Prog. Ser. 307:161-173. (Ref. 3004)
IUCN Red List Status
(Ref. 130435: Version 2025-1)
CITES status (Ref. 108899)
Not Evaluated
CMS (Ref. 116361)
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: commercial
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BHL | BOLD Systems | CISTI | DiscoverLife | FAO(Publication : search) | Fishipedia | GenBank (genome, nucleotide) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | Tree of Life | Wikipedia (Go, Search) | Zoological Record
Estimates based on models
Price category
(Ref. 80766):
Unknown.