Nomura's jellyfish

Nomura's jellyfish
Nomura's Jellyfish
Nemopilema nomurai in the Kaiyūkan-aquarium of Ōsaka
Conservation status
Not evaluated (IUCN 3.1)
Scientific classification
Kingdom: Animalia
Phylum: Cnidaria
Class: Scyphozoa
Order: Rhizostomae
Family: Stomolophidae
Genus: Nemopilema
Species: N. nomurai
Binomial name
Nemopilema nomurai
(Kishinouye, 1922)

Nomura's Jellyfish (エチゼンクラゲ echizen kurage?, Nemopilema nomurai) (for some time in the genus Stomolophus) is a very large jellyfish, in the same size class as the lion's mane jellyfish, the largest cnidarian in the world. The diameter of one fully grown is slightly greater than the height of an average fully grown man. The species was named in tribute to Mr. Kan'ichi Nomura (C18–C19), Director General of the Fukui Prefectural Fisheries Experimental Station, who in early December 1921 sent a specimen in a 72-litre wooden tank to Kishinouye, who found that it was unknown and spent some time at the station to study living specimens.[1]

Growing up to 2 m (6.6 ft) in diameter and weighing up to 200 kg (440 lb),[2] Nomura's Jellyfish reside primarily in the waters between China and Japan, primarily centralized in the Yellow Sea and East China Sea. Shin-ichi Uye, Japan's leading expert on the little-studied jellyfish, artificially bred some in his Hiroshima University lab, learning about their life cycle, growth rates and feeding habits. He traveled by ferry between China to Japan in 2009 to confirm they were riding currents to Japanese waters. A U.S. marine scientist, Jennifer Purcell of Western Washington University, has found a correlation between global warming and jellyfish on a much larger scale, in at least 11 locations, including the Mediterranean and North seas, and Chesapeake and Narragansett bays.[3]

In 2009, a 10-tonne fishing trawler, the Diasan Shinsho-maru, capsized off Chiba on Tokyo Bay as its three-man crew tried to haul in a net containing dozens of Nomura's Jellyfish; the three were rescued by another trawler.[4]

Size comparison of a Nomura's jellyfish next to a diver


  1. ^ Hansson, Hans G.. "Biographical Etymology of Marine Organism Names. N & O". Tjärnö Marine Biological Laboratory. Retrieved 16 November 2009. "Drs Toyokawa Masaya & Kensuke Yanagi kindly informed about Kanichi Nomura" 
  2. ^ Discovery News -- Monster Jellyfish
  3. ^ Casey, Michael; Yuasa, Shino (15 November 2009). "Jellyfish swarm northward in warming world". AP. Retrieved 16 November 2009. "KOKONOGI, Japan – A blood-orange blob the size of a small refrigerator emerged from the dark waters, its venomous tentacles trapped in a fishing net." 
  4. ^ Ryall, Julian (2 November 2009). "Japanese fishing trawler sunk by giant jellyfish". Retrieved 3 November 2009. 

External links

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