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Copula (jellyfish) : ウィキペディア英語版 | Copula (jellyfish)
''Copula'' is a monotypic genus of box jellyfish in the family Tripedaliidae of the phylum Cnidaria. The only species in the genus is ''Copula sivickisi'', a very small gelatinous, bell-shaped organism with four tentacles that is active only at night. It is unusual among box jellyfish in having a mating ritual and internal fertilisation. The specific name honours the Lithuanian zoologist Pranciškus Baltrus Šivickis.〔(【引用サイトリンク】title=Biographical Etymology of Marine Organism Names: S )〕 ==Description== ''Copula sivickisi'' is a very small species of jellyfish, the medusa growing to about in diameter. The bell is a more "boxy" shape than that of the umbrella-like true jellyfishes. The eight gonads can be seen inside the transparent bell. In males these are orange hemispherical structures near the apex of the bell, and in females they are white-speckled, leaf-like structures. There is a central manubrium, a transparent tubular structure hanging down from the centre of the underside of the bell and there are four slender tentacles hanging from the rim, each banded with orange. In mature females, the edge of the bell is patterned with orange-brown markings.
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