第 1095 號，共 1 402 號

Pacific sea nettle

Chrysaora fuscescens

名字的由來： The name 'nettle' refers to its sting, which is like that of the stinging nettle plant. Its genus name, Chrysaora, is Greek for 'he who has a golden armament', after the golden colour of its bell.1

只是會痛不要碰會痛，但不會對你造成嚴重傷害。

水母和會螫人的海洋生物

會螫人的觸手吃：肉

對人的危險: 疼痛可能會非常痛，但幾乎從來不會很嚴重。

The Pacific sea nettle is a large jellyfish with a golden-brown bell and long, trailing tentacles. It lives in the cool and temperate coastal waters of the northeastern Pacific Ocean, from southern British Columbia down to Mexico. Its sting is irritating, but it is rarely dangerous to people.1

分布在

Northeastern Pacific Ocean, from southern British Columbia and the US West Coast south to Baja California Sur, Mexico1

太平洋

首頁

It lives in temperate to cooler coastal waters. Its numbers peak in late summer, and it has become very abundant off the coast of Oregon. Dense swarms can clog fishing nets and water intakes.1

長度

1 m (3,3 ft)1

最高速度

大約 0,9 km/h（0,56 mph）

游泳, 粗略估計

牠吃什麼？

It drift-feeds, hanging its stinging tentacles in the water like a large net to catch prey as it floats past. It eats zooplankton, crustaceans, salps, pelagic snails, small fish, fish eggs and larvae, and other jellyfish.1

Pacific sea nettle 的照片 — Pacific sea nettle。照片：Ed Bierman。 CC BY 4.0, iNaturalist.

怎麼認出牠

Golden-brown bell with a reddish tint1
Bell usually less than 50 cm across1
Long, spiralling whitish oral arms1
24 undulating maroon tentacles that can trail up to 4.6 m behind it1

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？

When prey touches the tentacles, thousands of stinging cells (nematocysts) fire barbed stingers that inject venom. The venom contains proteins, including proteases and pore-forming toxins, which can disrupt cell membranes and tissues. The venom is effective against prey and humans, but is typically not lethal to people.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。

Its sting is often irritating and possibly mildly painful to people, but it is rarely dangerous. It is typically nonlethal to humans.1

牠害怕時會做什麼？

Its stinging tentacles are its main defence, although some animals, such as leatherback turtles, are not bothered by the sting.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

牠有多大？

牠有多長？

跟 2 隻家貓從鼻子接到尾巴一樣長跟 6 根香蕉頭尾相接一樣長

Pacific sea nettle 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)

Pacific sea nettle 大約 0,9 km/h (0,56 mph)

一個正在游泳的人 大約 3 km/h (1,9 mph)

值得知道

小知識

Small fish and crabs sometimes hide inside its bell, where they may feed on it.1

It uses light-sensing organs called ocelli to migrate from deep water up to the surface.1

It swims by jet propulsion, squeezing its bell to push water out, though it mostly floats.1

Its population may be growing because of nutrient pollution from human sources, which feeds algal blooms and the wider food chain.1

It is kept in many aquariums because of its bright colours and very long tentacles, and it is low-maintenance in captivity.1

給毒液專家

學名: Chrysaora fuscescens
類群: 水母和會螫人的海洋生物
家人: Pelagiidae2
排序: Semaeostomeae
各大洲: 太平洋, 海洋
寶寶: Females hold fertilised eggs on their oral arms, where they grow into free-swimming larvae. The larvae settle, become polyps, and bud new polyps before developing into jellyfish. No number is given.1
對人的危險: 2 / 5: 疼痛3