第 1275 號，共 1 402 號

Collector urchin

Tripneustes gratilla

只是會痛會痛，但不會對你造成嚴重傷害。

螫吃：植物

The collector urchin is a sea urchin, a spiny animal that lives on the seabed. It is found in warm seas across the Indo-Pacific, Hawaii, the Red Sea and The Bahamas. It is special because it grazes on seagrass and algae day and night, and it has been used in Hawaii to help control an invasive seaweed.1

分布在

Indo-Pacific, Hawaii, the Red Sea and The Bahamas1

印度洋, 太平洋, 紅海, 珊瑚海, 菲律賓海, 阿拉伯海與波斯灣, 帝汶海與阿拉弗拉海, 孟加拉灣

首頁

Collector urchins live on the sea floor at depths of 2 to 30 metres. Mature urchins prefer open sea bottoms with some cover, while young urchins prefer rocky areas where they can hide.1

長度

10 cm 到 15 cm (3,9 in 到 5,9 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？

Collector urchins graze continually near the seabed, day and night, on algae, periphyton and seagrass. Most feed on seagrass fronds.1

Collector urchin 的照片 — Collector urchin。照片：Philippe Bourjon。 CC BY-SA 4.0, iNaturalist.

怎麼認出牠

Usually dark, bluish-purple in colour, with white spines1
Some individuals have orange spines, or spines with orange tips1
Debris tends to collect on the body, which is how it got its name1
Reaches 10 to 15 cm in size1

毒液力量

螫

毒液從螫針出來。

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。

如果牠螫人

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印度洋紅海珊瑚海菲律賓海阿拉伯海與波斯灣帝汶海與阿拉弗拉海孟加拉灣

牠有多大？

牠有多長？

跟 5 塊玩具積木排成一排一樣長比花園蝸牛還慢

Collector 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)

Collector 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

In 2011, Hawaii placed 1,000 native collector urchins on a reef in Kaneohe Bay to help control an invasive seaweed called Kappaphycus, which had overrun local coral.1

Collector urchins feed heavily on seagrass between November and January, and one study found they ate up to or more than half of seagrass production in that period.1

Their name comes from the way debris collects on their bodies.1

Unlike many other sea urchins, collector urchins graze all day and all night.1

Their bright colours fade when the animal dies or is taken out of the ocean.1

They are prey for puffer fish, octopuses and humans.1