第 1274 號，共 1 402 號

Radiant sea urchin

Astropyga radiata

名字的由來： Astropyga comes from Greek words meaning star and anus, after the star-shaped pattern around its anus. Radiata is Latin for radiant, after its colours and spines.1

只是會痛不要碰會痛，但不會對你造成嚴重傷害。

海膽、海星和蟲

有毒液的棘刺吃：植物

對人的危險: 疼痛可能會非常痛，但幾乎從來不會很嚴重。

The radiant sea urchin is a large, colourful sea urchin with long, spiky spines. It lives in warm, shallow seas across the Indo-Pacific, from the African coast to Hawaii and Australia. Its spines are venomous, so it is one to admire from a distance.1

分布在

Tropical Indo-Pacific, from the African coast to Hawaii and Australian waters1

印度洋, 太平洋, 珊瑚海, 菲律賓海, 帝汶海與阿拉弗拉海, 孟加拉灣

首頁

It is often found in lagoons and bays where the seabed is sand, shingle or coral rubble. It usually lives at 10 to 30 metres deep, and can go down to about 70 metres. Sometimes many urchins gather together in one place.1

長度

20 cm (7,9 in)1

最高速度

大約 0,02 km/h（0,01 mph）

游泳, 粗略估計

牠吃什麼？

It is mostly active at night and feeds by grazing on algae. It has five powerful teeth in a mouth at the centre of its underside, known as an Aristotle's lantern.1

Radiant sea urchin 的照片 — Radiant sea urchin。照片：Dan Schofield。 CC BY 4.0, iNaturalist.

怎麼認出牠

A large urchin, with a body (test) up to 20 cm across.1
Long, hollow spines up to 4 cm, in five vertical clusters.1
Between the clusters are bare, V-shaped red areas with lines of iridescent blue dots.1
The rest of the body and spines range from reddish brown to purple, dark brown or nearly black.1
Juveniles have spines with banding across them, and this sometimes stays into adulthood.1

常被誤認為： It is often called the false fire urchin to tell it apart from the true fire urchin, Asthenosoma varium.1

毒液力量

有毒液的棘刺

尖銳的棘刺帶著毒液。踩到或抓到牠都會很痛。

牠的毒液有什麼作用？

Its spines are venomous and can cause painful wounds. The spines are long and hollow, and the shorter of the two kinds are the venomous ones.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。

It is not deadly to humans, but its spines can cause painful wounds. Because it is large and brightly coloured, divers can usually see it, so injuries from stepping on one are fairly rare. On the 'Kings of Pain' pain index it scores 12 out of 30.1

牠害怕時會做什麼？

It is sensitive to light and can angle its spines towards an approaching threat.1

如果牠的棘刺刺到你

把傷口泡在熱水裡，水溫要在傷者能忍受、又不會燙傷的範圍內，並就醫請醫生取出棘刺。不要自己挖出來。

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。
如果被牠的棘刺刺到：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印度洋珊瑚海菲律賓海帝汶海與阿拉弗拉海孟加拉灣

牠有多大？

牠有多長？

跟 6 塊玩具積木排成一排一樣長比花園蝸牛還慢

Radiant sea urchin 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)

Radiant sea urchin 大約 0,02 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

A crab called Dorippe frascone carries the urchin on its back.1

Several shrimps, crabs and small fish live among its spines for shelter.1

Its scientific name refers to a star-shaped pattern around its anus, not to the animal's shape as a whole.1

Its bright colours and size make it a favourite subject for underwater photographers and some expert fish-keepers.1

Its young larvae drift in the ocean as plankton before they settle on the seabed.1

給毒液專家

學名: Astropyga radiata
類群: 海膽、海星和蟲
家人: Diadematidae2
排序: Diadematoida
各大洲: 印度洋, 太平洋, 珊瑚海, 菲律賓海, 帝汶海與阿拉弗拉海, 孟加拉灣, 海洋
寶寶: Males and females are separate. Eggs and sperm are released into the water, and the larvae drift as plankton through several stages before settling on the seabed and becoming juveniles.1
對人的危險: 2 / 5: 疼痛3