Spotted Jellyタコクラゲ

Mastigias papuaNE— Not Evaluated

The spotted jelly is a Rhizostomeae jellyfish found throughout the Indo-Pacific, from Japan and Fiji to the western Indian Ocean and Australia. It hosts photosynthetic zooxanthellae in its tissue and performs a daily vertical migration to keep its algae in sunlight, while also catching zooplankton with its cnidocyte-covered arms. It is best known from the isolated population in Palau's Jellyfish Lake, whose sting has become harmless to humans; the species' conservation status has not been formally evaluated by the IUCN.

Spotted Jelly (reference photo)
Photo: Σ64 / CC BY 3.0 / Source / cropped

Species Data

Classification
Rhizostomeae / Mastigiidae Source
Distribution
Ranges throughout the Indo-Pacific from the Fijian archipelago to the western Indian Ocean and from Japan to Australia. Source

Did You Know?

  • It performs daily vertical migration, rising near the surface by day to expose its symbiotic algae to sunlight, then sinking deeper at night. Source
  • The population isolated in Palau's Jellyfish Lake has lost most of its stinging ability and is essentially harmless to touch. Source

Where to See This Species

2 facilities · 0 individuals

かごしま水族館 (Kagoshima Suizokukan)Kagoshima鹿児島中央駅から市電（2系統）「水族館口」下車、徒歩8分。

かごしま水族館のWikipedia記事に飼育種として記載 Source

すみだ水族館 (Sumida Suizokukan)Tokyo東武スカイツリーライン「とうきょうスカイツリー」駅すぐ。

すみだ水族館のWikipedia記事に飼育種として記載 Source

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Conservation Story

Conservation Status

IUCNの評価はNEです。共生藻に依存するため、水温や光環境の変化に注意が必要です。

Habitat

インド太平洋の浅い沿岸、湾、ラグーン。

Threats

  • 海水温上昇
  • 沿岸開発
  • 水質悪化

Conservation & Breeding Efforts

  • 沿岸浅海の保全
  • 共生生物の展示・教育

Sources

en.wikipedia.org

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FAQ

Why does the spotted jelly migrate up and down every day?
It rises to the surface during the day so the photosynthetic zooxanthellae living in its tissue can access sunlight, then moves deeper at night. Source
Is it safe to touch?
The population in Palau's Jellyfish Lake has lost most of its sting and is harmless, though jellies elsewhere still carry functional stinging cells. Source

Source: ja.wikipedia.org en.wikipedia.org