Black sea nettle
The black sea nettle is a large jellyfish with a dark purple to nearly black bell. It lives in the Pacific Ocean off western North America, and it is rare to see except in big swarms that appear in some years. Its stinging tentacles can cause a painful sting to people.1

怎麼認出牠
- The bell is an opaque dark purple to nearly black colour.1
- The edge of the bell has a lighter brown, net-like (reticulated) pattern.1
- The bell can reach about 1 metre across, and the oral arms can extend 5 or 6 metres.1
- There are marginal sense organs around the bell edge, one after every set of 3 tentacles, 8 in total.1
常被誤認為: No other West Coast jelly that visits nearshore waters has this dark pigmentation, so the very dark colour is the main way to tell it apart.1
毒液力量
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?
Each tentacle is covered in thousands of microscopic stinging cells called nematocysts. When touched, they fire a filament that injects toxins, which can kill smaller prey or stun predators. In people, the sting is usually not lethal but is painful and can last for forty minutes.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 usually not lethal to people, but it is painful and can last for about forty minutes.1
牠害怕時會做什麼?
Its stinging tentacles fire venom-filled filaments on contact, which stun or deter anything that threatens it.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
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
可以在 95 秒內游完一座大游泳池(50 公尺)Black 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?
小知識
It is thought to be the largest invertebrate described in the 20th century.1
Its stomach is lined with fibrous vessels that attach to prey, and its mouth-like openings, called darkmaws, close when exposed to bright light.1
It was only officially described in 1997, after large groups were found on the Pacific coast.1
Its swarms seem to coincide with red tides, which are blooms of the zooplankton it feeds on.1
知識的出處
- Chrysaora achlyos (Wikipedia (CC BY-SA 4.0))
- Chrysaora achlyos (iNaturalist): 名稱和分類。
- Venom Wiki: 危險等級、一般大小和速度估計都是我們自己定的。看看我們是怎麼算出來的: 我們怎麼評估危險.
這一頁的每個知識都有一個數字,指向它的出處。如果我們寫錯了,對不起,我們是動物迷,不是科學期刊。寫信到 [email protected] 告訴我們,我們會修正。
會螫人的觸手
