第 1173 号，共 1 402 张

Blue sea dragon

Glaucus atlanticus

名字的由来： The generic name Glaucus comes from the Ancient Greek word glaukós, meaning "bluish-grey", "bluish-green" or "gleaming".1

只是会疼会疼，但不会对你造成严重伤害。

芋螺和章鱼

蜇伤吃：肉

对人的危险: 很疼可能真的很疼，但几乎从不严重。

The blue sea dragon is a small, bright blue sea slug that floats upside down on the open ocean. It drifts with winds and currents in warm and temperate seas around the world. It is special because it steals stinging cells from the animals it eats and uses them as its own weapon.1

生活在

Warm and temperate oceans worldwide, including South Africa, Europe, eastern Australia, Brazil, India and Thailand1

大西洋, 太平洋, 印度洋

首页

It lives in the open ocean (the pelagic zone) and is carried by winds and currents. Because it sometimes washes up on shore, people may find it on beaches, for example in Thailand, Spain and Texas.1

长度

3 cm (1.2 in)1

最高速度

约 0.01 公里/小时（0.01 英里/小时）

游泳, 粗略估计

它吃什么？

It feeds on other floating sea animals, including the Portuguese man o' war and other venomous siphonophores. It bites off chunks of its prey with serrated teeth and a strong jaw.1

Blue sea dragon的照片 — Blue sea dragon。照片：Sylke Rohrlach。 CC BY-SA 4.0, iNaturalist.

怎样认出它

Usually around 3 cm long1
Floats upside down at the surface, with its blue side facing up1
Silvery grey on its back, which faces down in the water1
Dark blue stripes on its head1
Six finger-like, feathery appendages called cerata1

常被误认为： It is closely related to G. marginatus, which is now known to be four separate species living in the Indian and Pacific Oceans. It also shares the name "blue dragon" with Pteraeolidia ianthina and G. marginatus.1

毒液之力

蜇伤

毒液通过蜇刺出来。

它的毒液会造成什么？

It does not make its own venom. It takes the stinging cells (nematocysts) from the Portuguese man o' war and stores them in its cerata, a process called kleptocnidy. Because it concentrates this venom, its sting can be stronger than that of the animal it eats. Symptoms can include pain, nausea, vomiting, a rash, redness and blisters.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。

Picking up the animal can cause a very painful sting that may be potentially dangerous. Its sting produces symptoms similar to those of the Portuguese man o' war.1

它害怕时会做什么？

It stores stinging cells from its prey in its cerata and uses them against predators.1

如果它蜇人

加压固定法：用有弹性的绷带紧紧缠住咬伤处，再缠满整条肢体，用夹板固定，让人完全不动，直到救援到来。
蓝环章鱼或芋螺可能让人在清醒时停止呼吸：立刻呼救，并准备好做人工呼吸，直到救护车接手。

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大西洋印度洋

它有多大？

它有多长？

差不多和一个回形针一样长比花园蜗牛还慢

Blue sea dragon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？

一只海马 约 0.0015 公里/小时 (0 mph)

Blue sea dragon 约 0.01 公里/小时 (0.01 mph)

一只花园蜗牛 约 0.05 公里/小时 (0.03 mph)

值得了解

事实

It can eat the Portuguese man o' war without harm, because it is immune to that animal's stinging cells.1

It floats upside down because its gas-filled stomach sac sits on the wrong side of its body, so its foot becomes its upper surface.1

Its blue colour is thought to reflect harmful ultraviolet sunlight.1

Its countershading, with blue on top and silver-grey below, helps it hide from predators above and below.1

It can lay up to 55 egg strings per hour.1

给毒液专家

学名: Glaucus atlanticus
类别: 芋螺和章鱼
家人: Glaucidae2
排序: Nudibranchia
大洲: 大西洋, 太平洋, 印度洋, 海洋
宝宝: After mating, both partners lay egg strings with up to 20 eggs on each string, often in wood or on carcasses.1
寿命: 约 1 年1
对人的危险: 2 / 5: 很疼3