第 1084 號，共 1 402 號

Mangrove box jellyfish

Tripedalia cystophora

無害對人無害。不用擔心。

會螫人的觸手吃：肉

The mangrove box jellyfish is a small, boxy jellyfish about 1 cm across. It lives in sunlit water among mangrove roots in the Caribbean Sea, the Central Indo-Pacific and off the north coast of South America. Its bell is see-through, so it can be hard to spot.1

分布在

Caribbean Sea, Central Indo-Pacific, Coral Sea and off the north coast of South America1

大西洋, 加勒比海, 太平洋

首頁

During the day it stays within 20 cm of the surface, in sunlit spots among the prop roots of mangrove trees. At night it moves a few metres further into the shallow lagoon. One colony was found along the edges of mangrove lagoons in Puerto Rico.1

長度

1 cm (0,4 in)1

最高速度

大約 5 km/h（3,1 mph）

游泳, 粗略估計

牠吃什麼？

It feeds mainly on the copepod Dioithona oculata, a tiny crustacean. It sinks slowly towards the bottom with its tentacles spread out around it to catch prey.1

Mangrove box jellyfish 的照片 — Mangrove box jellyfish。照片：Kathy Richardson。 CC BY 4.0, iNaturalist.

怎麼認出牠

Bell about 1 cm across, with a boxy, dome-shaped body1
Flattened top, and wider than it is high1
Three tentacles arising from each of the four corners of the bell1
Translucent yellowish-brown colour1
Wart-like bumps on the outer surface of the bell1

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。

牠對人有多危險？

對人的危險: 輕微跟蜜蜂螫差不多或更輕微。對人基本上無害。

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大西洋加勒比海

牠有多大？

牠有多長？

小到可以坐在你的指甲上可以在 36 秒內游完一座大游泳池（50 公尺）

Mangrove box 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？

一個正在游泳的人 大約 3 km/h (1,9 mph)

Mangrove box jellyfish 大約 5 km/h (3,1 mph)

奧運游泳選手 大約 8 km/h (5 mph)

值得知道

小知識

It has six eyes in each of its four rhopalia, which are structures on the bell that contain light-sensitive cells.1

It can spot a cylindrical object such as a mangrove root when it gets close and swerve sharply to avoid it.1

It stays in shafts of sunlight where its copepod prey gathers, which helps it catch more food.1

Its life cycle includes a small polyp stage that attaches to the seabed before young jellyfish form.1

給毒液專家

學名: Tripedalia cystophora
類群: 水母和會螫人的海洋生物
家人: Tripedaliidae2
排序: Carybdeida
各大洲: 大西洋, 加勒比海, 太平洋, 海洋
寶寶: After fertilisation, the female broods the planula larva inside her bell until it is expelled. The larva settles on the bottom and becomes a small polyp, which can bud new polyps and eventually produce young jellyfish.1
對人的危險: 1 / 5: 輕微3