How big does a flower hat jelly get?

Its bell typically reaches about 10-15 cm (4-6 in) in diameter at maturity.

Is the flower hat jelly dangerous to humans?

Its sting delivers a painful, burning sensation, but it is not considered a serious threat to humans under normal circumstances.

Where does the flower hat jelly live?

It is found in the northwestern Pacific along central and southern Japan and Jeju Island, South Korea, and also occurs off Brazil and Argentina, usually resting on rocky or algae-covered seabeds during the day.

Flower Hat Jellyハナガサクラゲ

Olindias formosusNE— Not Evaluated

The flower hat jelly is a striking jellyfish from the northwestern Pacific, named for its coiled, fluorescent-tipped tentacles that resemble a flower-shaped hat. It rests on the seafloor by day and rises to hunt small fish at night, delivering a sting that is painful but not considered life-threatening under normal circumstances.

Flower Hat Jelly (reference photo) — Photo: Totti / CC BY-SA 4.0 / Source / cropped

Species Data

Classification: Limnomedusae / Olindiidae Source
Size: Bell diameter about 10–15 cm in adults
Diet: Carnivore Paralyzes small fish with the venom of its tentacle stinging cells and swallows them whole
Activity: Rests motionless on the bottom in the shade of rocks by day, rising at night to swim and hunt
Distribution: Found in the northwestern Pacific off central and southern Japan and Jeju Island, South Korea, as well as coastal waters of Brazil and Argentina. Source
Sources: ja.wikipedia.org en.wikipedia.org

Did You Know?

The species name formosa is Latin for "beautiful," and the jelly's graceful swimming inspired its Japanese name, which likens it to the traditional "hanagasa" flower-hat dance. Source
The tips of its tentacles glow with fluorescent yellow-green or pink hues, thought to lure small fish within striking range. Source
It has been observed grasping small pebbles with its tentacles to weigh itself down and resist being swept away by currents. Source

Where to See This Species

Operating facilities registered on this site: Japan 2 · Overseas 1

Japan Overseas

Osaka Aquarium KaiyukanOsakaOpened in 1990

Source

KAMO AQUARIUMYamagataFrom JR Tsuruoka Station, take the Shonai Airport shuttle bus bound for Yunohama Onsen for about 40 minutes and get off at "Kamo Suizokukan"; the aquarium is right there (note that buses via Zenpoji do not stop here).

Source

Monterey Bay AquariumOpened in 1984

Source

Former facilities

Marinpiamatsushima SuizokukanMiyagiOpened in 1927

Source

Closed: 2015-05-10 Official Site

Conservation Story

Conservation Status

Not Evaluated (NE)

Sources

en.wikipedia.org

Support Conservation

A visit is a small, positive way to support the daily lives of the animals you care about.

Visit: A visit itself helps support the facility.
Animal Supporter Programs & Giving: Find ways to support the facility through its official website.
Furusato Nozei: Municipally run facilities may share official guidance for this Japanese hometown-tax program.

FAQ

How big does a flower hat jelly get?: Its bell typically reaches about 10-15 cm (4-6 in) in diameter at maturity. Source
Is the flower hat jelly dangerous to humans?: Its sting delivers a painful, burning sensation, but it is not considered a serious threat to humans under normal circumstances. Source
Where does the flower hat jelly live?: It is found in the northwestern Pacific along central and southern Japan and Jeju Island, South Korea, and also occurs off Brazil and Argentina, usually resting on rocky or algae-covered seabeds during the day. Source
How many operating facilities are registered here?: Operating facilities registered on this site: Japan 2 · Overseas 1 Source

Books & gear

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