第 1271 号，共 1 402 张

Savigny's long-spined urchin

Diadema savignyi

名字的由来： The species name honours Marie Jules César Savigny, a French zoologist who described many new marine species from the Mediterranean and Red Sea.1

只是会疼不要触摸会疼，但不会对你造成严重伤害。

海胆、海星和蠕虫

有毒的刺吃：植物

对人的危险: 很疼可能真的很疼，但几乎从不严重。

Savigny's long-spined urchin is a spiny sea animal that lives on reefs and in shallow lagoons. It has very long, thin spines that can grow up to 25 cm, and it comes out at night to graze on algae. Its spines are the part that can hurt people, so it is worth giving it plenty of room.1

生活在

East coast of Africa, Red Sea, Indian Ocean, western Pacific, French Polynesia, Hawaii, New Caledonia and northern Australia1

印度洋, 太平洋, 红海, 阿拉伯海和波斯湾, 帝汶海和阿拉弗拉海, 孟加拉湾

首页

It is found on mixed sandy, rocky and coral seabed, especially in places disturbed by storms or other natural events. It lives from the surface down to about 70 metres deep. It often hides in crevices or under boulders during the day.1

长度

9 cm (3.5 in)1

最高速度

约 0.02 公里/小时（0.01 英里/小时）

游泳, 粗略估计

它吃什么？

It feeds at dusk on the algal mat that grows over the seabed, tearing it up as it grazes. This helps keep algae from overwhelming corals.1

Savigny's long-spined urchin的照片 — Savigny's long-spined urchin。照片：Anders Poulsen, Deep Blue (http://www.colours.dk/)。 CC BY-SA 3.0, Wikimedia Commons.

怎样认出它

Usually black, with a rounded body (called a test) up to about 9 cm across1
Long, thin, hollow spines that grow in tufts and can reach 25 cm; they are usually black but can be grey, dark brown or purple1
Juveniles may have bands of lighter and darker shades, and the occasional individual is completely white1
Iridescent green or blue lines around the interambulacral areas and around the periproct (the cone-shaped region surrounding the anus)1

常被误认为： It is very similar to Diadema setosum, which shares much of its range and often lives in the same groups. Savigny's long-spined urchin lacks the thin orange ring around the periproct that Diadema setosum has.1

毒液之力

有毒的刺

锋利的刺带着毒液。踩到或抓住它会很疼。

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。

它害怕时会做什么？

When a shadow falls on it, it angles its spines towards the possible attacker.1

如果它的刺扎到你

把伤口泡在热水里，水温以不烫伤为限、尽量热，然后去看医生取出刺。不要自己去挖。

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。
如果它的刺扎到你：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红海阿拉伯海和波斯湾帝汶海和阿拉弗拉海孟加拉湾

它有多大？

它有多长？

和 3 块玩具积木排成一排一样长比花园蜗牛还慢

Savigny's long-spined urchin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)

Savigny's long-spined urchin 约 0.02 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

Its spines are brittle, thin and hollow, and grow in tufts that can be as long as 25 cm.1

Small fish such as cardinal fish, flatworms and shrimps sometimes shelter among its long spines.1

It spawns just after the full moon, while its close relative Diadema setosum mostly spawns around days eight to ten of the lunar cycle, which keeps the two species from interbreeding.1

Its grazing helps control algae, which might otherwise smother corals.1

It is nocturnal, hiding in crevices or under boulders by day, though several individuals sometimes huddle together in the open.1

Its predators include pufferfish, porcupinefish, lobsters and snails.1

给毒液专家

学名: Diadema savignyi
类别: 海胆、海星和蠕虫
家人: Diadematidae2
排序: Diadematoida
大洲: 印度洋, 太平洋, 红海, 阿拉伯海和波斯湾, 帝汶海和阿拉弗拉海, 孟加拉湾, 海洋
宝宝: It does not have live young. Instead it releases eggs and sperm into the water (spawning), mainly during the north-east monsoon period, peaking in May, and timed to the lunar cycle.1
对人的危险: 2 / 5: 很疼3