第 1096 號，共 1 402 號

Compass jellyfish

Chrysaora hysoscella

名字的由來： It is named for the brown V-shaped markings on its bell, which resemble the face of a compass.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 compass jellyfish is a common jellyfish that lives in cool coastal seas of the northeast Atlantic, including the North Sea and the Mediterranean. Its bell has a pattern that looks like the face of a compass, which gives it its name. Its tentacles carry stinging cells, so it is best left alone.1

分布在

Coastal waters of the northeast Atlantic, including the Celtic, Irish, North and Mediterranean Seas1

大西洋, 地中海, 北海

首頁

It lives in shallow coastal water and moves up and down the water column, mostly near the surface and down to just above the seabed. It is rarely found deeper than 30 m.1

長度

15 cm 到 25 cm (5,9 in 到 9,8 in)1

最高速度

大約 0,7 km/h（0,44 mph）

游泳, 粗略估計

牠吃什麼？

It eats other marine invertebrates and plankton, including dinoflagellates, copepods, crustacean eggs, larval fish and chaetognaths. It stuns and catches prey with stinging cells on its tentacles, then its oral arms move the prey into its mouth.1

Compass jellyfish 的照片 — Compass jellyfish。照片：John Hepburn。 CC BY 4.0, iNaturalist.

怎麼認出牠

Adults have a bell 15 to 25 cm across, usually yellowish white with some brown.1
The bell has 16 brown, elongated V-shaped markings around a central brown spot.1
It has 24 tentacles arranged in eight groups of three.1
It has four oral arms that are noticeably longer than the tentacles and look folded and frilly.1
Juveniles lack the compass pattern. They look white and polka-dotted, with a reddish fringe on the bell edge.1

常被誤認為： Records of this species from the southeastern Atlantic, including South Africa, were caused by confusion with close relatives: C. africana, C. fulgida and an undescribed species tentatively called "C. agulhensis".1

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？

Each tentacle has stinging cells used to capture prey and to defend against predators. Jellyfish stings are painful and can be deadly to humans.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。

Jellyfish stings are painful and sometimes deadly to humans.1

牠害怕時會做什麼？

Stinging cells on its tentacles are used to defend it from predators.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大西洋地中海北海

牠有多大？

牠有多長？

跟 8 塊玩具積木排成一排一樣長

Compass jellyfish 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)

Compass jellyfish 大約 0,7 km/h (0,44 mph)

一個正在游泳的人 大約 3 km/h (1,9 mph)

值得知道

小知識

Males release sperm from their mouths into the water, and females can fertilise sperm from several males.1

Adults often carry a parasite called Hyperia medusarum, which settles inside the body, especially the gonads.1

Compass jellyfish have very few predators. Leatherback sea turtles and ocean sunfish are known to eat them.1

Warmer winters allow longer release periods for young, and the species is predicted to move further north as the seas warm.1

破解迷思

迷思： Compass jellyfish live in the southeastern Atlantic, including South Africa.

真相： Earlier records from there were due to confusion with close relatives. The species lives in the northeast Atlantic.1

給毒液專家

學名: Chrysaora hysoscella
類群: 水母和會螫人的海洋生物
家人: Pelagiidae2
排序: Semaeostomeae
各大洲: 大西洋, 地中海, 北海, 海洋
寶寶: Females release planular larvae, which settle on the seabed and grow into polyps. The polyps then release young medusae.1
對人的危險: 2 / 5: 疼痛3