第 1096 号，共 1 402 张

Compass jellyfish

Chrysaora hysoscella

名字的由来： It is named for the brown V-shaped markings on its bell, which resemble the face of a compass.1

只是会疼不要触摸会疼，但不会对你造成严重伤害。

水母和海中蜇人生物

会蜇人的触手吃：肉

对人的危险: 很疼可能真的很疼，但几乎从不严重。

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

生活在

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

大西洋, 地中海, 北海

首页

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

长度

15 cm到25 cm (5.9 in到9.8 in)1

最高速度

约 0.7 公里/小时（0.44 英里/小时）

游泳, 粗略估计

它吃什么？

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.

怎样认出它

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

常被误认为： 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

毒液之力

会蜇人的触手

一碰到东西，成千上万个小刺细胞就会发射。

它的毒液会造成什么？

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

它对人有多危险？

对人的危险: 很疼可能真的很疼，但几乎从不严重。

Jellyfish stings are painful and sometimes deadly to humans.1

它害怕时会做什么？

Stinging cells on its tentacles are used to defend it from predators.1

如果它蜇人

离开水面，取下所有触手（戴手套或用布）。
热带箱水母：在蜇伤处倒醋至少 30 秒，呼救，并准备好做心肺复苏。僧帽水母和大多数其他水母：先用海水冲洗，再用热水止痛。

一定先拨打你的急救电话（112、000、911）。这里是一般急救指导，不是医疗建议。急救基础

注意安全

永远不要摸、抓或逗弄野生动物，即使是很小的，即使它看起来在睡觉或已经死了。
给它留出空间。如果遇到它，保持冷静，慢慢后退，让它走自己的路。
如果被它蜇了：保持冷静，保持不动，拨打你的急救电话（112、000、911）或尽快去医院。记住它长什么样，拍张照片会有帮助。

它不是冲着你来的。它用毒液捕猎或保护自己，而且它更愿意躲起来。更多安全知识

在世界哪里？

非洲亚洲欧洲北美洲南美洲澳大利亚和大洋洲大西洋地中海北海

它有多大？

它有多长？

和 8 块玩具积木排成一排一样长

Compass jellyfish和你比起来有多大？

只是在你的浏览器里算一算。什么都不会被保存或发送到任何地方。

它有多快？

一只花园蜗牛 约 0.05 公里/小时 (0.03 mph)

Compass jellyfish 约 0.7 公里/小时 (0.44 mph)

一个在游泳的人 约 3 公里/小时 (1.9 mph)

值得了解

事实

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

谣言粉碎机

谣言： 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

给毒液专家

学名: Chrysaora hysoscella
类别: 水母和海中蜇人生物
家人: Pelagiidae2
排序: Semaeostomeae
大洲: 大西洋, 地中海, 北海, 海洋
宝宝: Females release planular larvae, which settle on the seabed and grow into polyps. The polyps then release young medusae.1
对人的危险: 2 / 5: 很疼3