第 1173 號，共 1 402 號

Blue sea dragon

Glaucus atlanticus

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

只是會痛會痛，但不會對你造成嚴重傷害。

芋螺和章魚

螫吃：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 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

分布在

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

大西洋, 太平洋, 印度洋

首頁

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

長度

3 cm (1,2 in)1

最高速度

大約 0,01 km/h（0,01 mph）

游泳, 粗略估計

牠吃什麼？

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.

怎麼認出牠

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

常被誤認為： 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

毒液力量

螫

毒液從螫針出來。

牠的毒液有什麼作用？

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

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。

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

牠害怕時會做什麼？

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

如果牠螫人

加壓固定法：用彈性繃帶緊緊包住咬傷處，再往上包住整條手臂或腿，用夾板固定，並讓傷者完全不動，直到救援抵達。
藍環章魚或芋螺會讓人在意識還清醒時就停止呼吸：馬上求救，並準備好做人工呼吸，直到救護人員接手。

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印度洋

牠有多大？

牠有多長？

大約跟一根迴紋針一樣長比花園蝸牛還慢

Blue sea dragon 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？

一隻海馬 大約 0,0015 km/h (0 mph)

Blue sea dragon 大約 0,01 km/h (0,01 mph)

一隻花園蝸牛 大約 0,05 km/h (0,03 mph)

值得知道

小知識

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

給毒液專家

學名: Glaucus atlanticus
類群: 芋螺和章魚
家人: Glaucidae2
排序: Nudibranchia
各大洲: 大西洋, 太平洋, 印度洋, 海洋
寶寶: After mating, both partners lay egg strings with up to 20 eggs on each string, often in wood or on carcasses.1
壽命: 大約 1 年1
對人的危險: 2 / 5: 疼痛3