第 1120 號，共 1 402 號

Flower hat jelly

Olindias formosus

只是會痛不要碰會痛，但不會對你造成嚴重傷害。

會螫人的觸手吃：魚類

The flower hat jelly is a small, glowing sea creature from the northwestern Pacific, living off central and southern Japan and Jeju Island in South Korea. Although it looks like a jellyfish, it is a hydromedusa, a close relative of hydroids. It matters to people because its sting can cause a painful rash, and it is one of the few of its kind known to have caused a death.1

分布在

Northwestern Pacific off central and southern Japan, and Jeju Island, South Korea1

太平洋, 印度洋, 紅海

首頁

During the day it rests on the bottom, often among rocks or algae. At night it floats up into the water to hunt.1

長度

15 cm (5,9 in)1

最高速度

大約 0,6 km/h（0,37 mph）

游泳, 粗略估計

牠吃什麼？

It mainly eats small fish. It floats up at night to hunt, and its glowing light draws prey closer, where it can be caught.1

Flower hat jelly 的照片 — Flower hat jelly。照片：mark6mauno。 CC BY-SA 4.0, iNaturalist.

怎麼認出牠

Fluorescent, so it glows when light falls on it1
Lustrous tentacles that coil and stick to the rim of the bell when not in use1
Translucent bell with opaque, pinstriped bands1
Grows up to about 15 cm across1

毒液力量

會螫人的觸手

有東西碰到時，成千上萬個小小的刺細胞就會發射。

牠的毒液有什麼作用？

The sting is generally mildly painful and leaves a rash.1

牠對人有多危險？

對人的危險: 疼痛可能會非常痛，但幾乎從來不會很嚴重。

The sting is generally mildly painful. There is a single known human fatality from Japan.1

如果牠螫人

離開水裡，把觸手拿掉（戴手套或用布）。
熱帶箱形水母：在螫傷處倒醋至少 30 秒，求救，並準備好做心肺復甦術（CPR）。藍瓶水母和大多數其他水母：用海水沖洗，再用熱水止痛。

一定要先打緊急電話（112、000、911）。這是一般急救指引，不是醫療建議。急救基本知識

注意安全

絕對不要碰、抓或捉弄野生動物，就算是很小的動物，就算牠看起來在睡覺或已經死了也一樣。
給牠空間。如果遇到了，保持冷靜，慢慢往後退，讓牠自己離開。
如果被牠螫了：保持冷靜，保持不動，打緊急電話（112、000、911）或趕快去醫院。記住牠的樣子，有照片會很有幫助。

牠不是想來抓你。牠用毒液來捕捉食物或保護自己，而且牠更想躲起來。更多安全知識

在世界上的哪裡？

非洲亞洲歐洲北美洲南美洲澳洲與大洋洲太平洋印度洋紅海

牠有多大？

牠有多長？

跟 5 塊玩具積木排成一排一樣長

Flower hat jelly 跟「你」比起來有多大？

只是在你的瀏覽器裡做算術。什麼都不會儲存，也不會傳送到任何地方。

牠有多快？

一隻花園蝸牛 大約 0,05 km/h (0,03 mph)

Flower hat jelly 大約 0,6 km/h (0,37 mph)

一個正在游泳的人 大約 3 km/h (1,9 mph)

值得知道

小知識

Its tentacles look random, but research has shown they are arranged mathematically, following a pattern called Fibonacci hashing.1

Its fluorescent light acts like a supernormal stimulus, luring prey towards it because the light is not normal for the habitat.1

A fluorescent protein from this species, called Gamillus, is used as a tag for tracking molecules in research, including work on SARS-CoV-2 viral entry.1

Adults are seen mainly from December to July, with peaks in April and May, and the adult form only lives a few months.1

破解迷思

迷思： It is a true jellyfish.

真相： Although it looks like a jellyfish, it belongs to the class Hydrozoa. True jellyfish belong to the class Scyphozoa.1

給毒液專家

學名: Olindias formosus
類群: 水母和會螫人的海洋生物
家人: Olindiidae2
排序: Limnomedusae
各大洲: 太平洋, 印度洋, 紅海, 海洋
寶寶: Its life cycle includes hydroids that bud and release medusae about 1 mm across, but little is known about this in the wild.1
對人的危險: 2 / 5: 疼痛3