第 1109 号，共 1 402 张

Upside-down jellyfish

Cassiopea andromeda

无害对人无害。不用担心。

会蜇人的触手吃：肉

The upside-down jellyfish is a jellyfish that usually rests with its mouth facing up, so it can look more like a sea anemone. It lives in shallow, sheltered coastal water, such as lagoons and mangrove areas. It is special because it shares a partnership with algae that give it colour and food.1

生活在

Shallow coastal waters around mangroves, lagoons, and intertidal sand or mudflats1

印度洋, 太平洋, 红海, 地中海, 帝汶海和阿拉弗拉海, 孟加拉湾

首页

It usually lives on intertidal sand or mudflats, in shallow lagoons, and around mangroves.1

长度

30 cm (1 ft)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 small animals from the sea, or pieces of them. It first paralyses its prey with its mucus and nematocysts, which are stinging cells.1

Upside-down jellyfish的照片 — Upside-down jellyfish。照片：prilfish。 CC BY 4.0, iNaturalist.

怎样认出它

Yellow-brown bell with white or pale streaks and spots1
Usually keeps its mouth facing upward1
Bell pulses to move water through its arms1
Can grow up to 30.0 cm wide1

常被误认为： It is often mistaken for a sea anemone. Its usual upward-facing mouth and pulsing bell are features to note.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？

Its stinging cells, called nematocysts, release venom that paralyses small prey. In people, a sting causes mild pain, a rash and swelling.1

它对人有多危险？

对人的危险: 轻微像被蜜蜂蜇一下或更轻。对人基本无害。

Its sting is painful, but the symptoms described are mild.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太平洋印度洋地中海红海帝汶海和阿拉弗拉海孟加拉湾

它有多大？

它有多长？

和 9 块玩具积木排成一排一样长

Upside-down 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)

Upside-down 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

It is a jellyfish, even though it is often mistaken for a sea anemone.1

A shrimp lives among its tentacles and removes parasites from it. In exchange, the jellyfish protects the shrimp.1

Tiny algae called zooxanthellae live in its tissues, giving it its colour. In return, the jellyfish gives the algae the sunlight they need.1

It can reproduce both by budding, when it is in its polyp form, and sexually, when it is in its medusa form.1

Its pulsing bell moves water through its arms, which helps it breathe and gather food.1

谣言粉碎机

谣言： It is a sea anemone.

真相： It is a jellyfish, a type of cnidarian, although it is often mistaken for a sea anemone.1

给毒液专家

学名: Cassiopea andromeda
类别: 水母和海中蜇人生物
家人: Cassiopeidae2
排序: Rhizostomeae
大洲: 印度洋, 太平洋, 红海, 地中海, 帝汶海和阿拉弗拉海, 孟加拉湾, 海洋
宝宝: The medusa female produces eggs and keeps them. The female uses her tentacles to catch sperm from the water to fertilise the eggs.1
对人的危险: 1 / 5: 轻微3