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Flower hat jelly

Flower hat jelly
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Cnidaria
Class: Hydrozoa
Order: Limnomedusae
Family: Olindiidae
Genus: Olindias
Species:
O. formosus
Binomial name
Olindias formosus
(Goto, 1903)[1][2]
Synonyms
  • Olindias formosa (Goto, 1903)
  • Olindioides formosa Goto, 1903

The flower hat jelly (Olindias formosus) is a species of hydromedusa in the hydrozoan family Olindiidae. Although they look like a jellyfish, they actually belong in the class Hydrozoa, while true jellyfish belong in class Scyphozoa. Flower hat jellies occur in the northwestern Pacific off central and southern Japan, and South Korea's Jeju Island.[3] (close relatives live elsewhere, like O. sambaquiensis found off Argentina and Brazil).[4] The adult form of the flower hat jelly only lives a few months and is typically seen from December to July, with peaks in April and May.[3] During the day they rest on the bottom, often among rocks or algae, but at night they float up to hunt for their prey,[3] typically small fish.[5]

The sting of the flower hat jelly is generally mildly painful and leaves a rash.[3][5] There is a single known human fatality from Japan.[3]

  1. ^ Cite error: The named reference worms was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference goto was invoked but never defined (see the help page).
  3. ^ a b c d e Patry, W.; T. Knowles; L. Christianson; M. Howard (2014). The hydroid and early medusa stage of Olindias formosus (Cnidaria, Hydrozoa, Limnomedusae). Journal of the Marine Biological Association of the United Kingdom 94(7): 1409–1415. doi:10.1017/S0025315414000691
  4. ^ Resgalla Junior, C.; A.L. Rosseto; V. Haddad Jr (2011). Report of an outbreak of stings caused by Olindias sambaquiensis Muller, 1861 (Cnidaria: hydrozoa) in Southern Brazil. Braz. j. oceanogr. 59(4). doi:10.1590/S1679-87592011000400009
  5. ^ a b Monterey Bay Aquarium: Flower hat jelly. Retrieved 17 March 2019.
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