Venom Wiki
Venom Wiki / 所有生物 / 其他有毒動物
Mangrove horseshoe crab 的卡通圖
第 1402 號，共 1 402 號

Mangrove horseshoe crab

Carcinoscorpius rotundicauda
名字的由來： It is named after mangrove swamps, where it lives. The other name, round-tailed horseshoe crab, refers to its tail, which is rounded in cross section.1
可能致命不治療的話可能致命。如果有人吃了牠，要趕快求救。
其他有毒動物 吃了會中毒吃：肉有毒（碰或吃會中毒），不是有毒液
對人的危險: 非常危險如果沒有治療，牠可能會害死一個人。

The mangrove horseshoe crab is a sea creature with a hard shell and a long spiky tail. It lives in warm, shallow, muddy coastal waters in South and Southeast Asia. Its flesh contains a deadly poison, so it is important to know it apart from a safe relative.1

有毒還是有毒液？有毒液的動物會用咬或螫把毒液注入身體。有毒的動物則是碰到或吃下去會有害。這種動物是有毒的（碰或吃會中毒）。
分布在
Tropical and brackish waters of India, Bangladesh and Southeast Asia. It may also occur in Sri Lanka, Myanmar and the Philippines.1
印度洋, 太平洋, 南海, 安達曼海, 孟加拉灣
首頁
It lives in shallow waters with soft, sandy bottoms or extensive mud flats, especially brackish, swampy areas such as mangroves. It spends most of its life close to or on the bottom. People meet it when fishermen collect it for food in Southeast Asia.1
長度
28 cm 到 40 cm (11 in 到 1,3 ft)1
最高速度
大約 0,5 km/h（0,31 mph）
游泳, 粗略估計
牠吃什麼？
It is a selective feeder on the bottom, eating mainly insect larvae, small fish, small crabs and thin-shelled bivalves. It has no jaws, so it grinds food with bristles on its legs and passes it to its mouth with its small front pincers.1
是真的！Mangrove horseshoe crab 的照片
Mangrove horseshoe crab。照片：Amada44。 CC BY 3.0, Wikimedia Commons.

怎麼認出牠

  • It is the smallest of the four living horseshoe crab species.1
  • Its tail has a rounded cross section. In the other species the tail is essentially triangular.1
  • Females are larger than males. Females are typically about 30.5 to 31.5 cm long including the tail.1
  • Adults have a large dome-shaped front shell, a smaller rear shell with spines on its edge, and a spike-like tail.1

常被誤認為： It is often confused with Tachypleus gigas, which is harmless to eat. The mangrove horseshoe crab has a rounded tail, while T. gigas has a triangular one. Tachypleus tridentatus can live in the same habitat.1

毒素力量

吃了會中毒

只有被吃下去時才有害。

牠的毒素有什麼作用？

Its flesh contains tetrodotoxin (TTX), a poison that is lethal. This is a poison in the food, not a venom from a bite or sting.1

牠對人有多危險？

對人的危險: 非常危險如果沒有治療，牠可能會害死一個人。

Several cases of food poisoning have happened after people ate this crab, and some of these cases were fatal. These cases usually occur when the crab is mistaken for the harmless T. gigas.1

如果有人碰了或吃了牠

  • 如果有人吃了牠，或吃了之後出現症狀：立刻打緊急電話或打給毒物諮詢中心。

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。
  • 如果你碰了或吃了牠：不要揉眼睛或摸嘴巴，把手洗乾淨，並且就醫。

牠不是想來抓你。牠的毒只是為了不讓別的動物吃掉牠。 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南海安達曼海孟加拉灣

牠有多大？

牠有多長？

Mangrove horseshoe crab 大約 40 cm 長 (1,3 ft)一根香蕉 大約 18 cm (7,1 in)一隻家貓 大約 50 cm (1,6 ft)
跟 2 根香蕉頭尾相接一樣長跟 12 塊玩具積木排成一排一樣長

Mangrove horseshoe crab 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？

值得知道

小知識

1

Its flesh contains a lethal poison, but its roe is a prized delicacy in Thailand, where it is served in a salad called yam khai maeng da.1

2

Horseshoe crabs have remained almost unchanged in shape and size for millions of years, and their fossils over 400 million years old look almost identical to living ones.1

3

Juveniles grow about 33% bigger each time they moult, taking about five moults to grow from 2 cm to adult size.1

4

Males cling to the backs of females for long periods before the eggs are laid, and it is thought that this species is monogamous.1

5

Horseshoe crabs have two compound eyes, which are mainly used to find a mate.1

破解迷思

迷思： All horseshoe crabs are safe to eat.

真相： The mangrove horseshoe crab is not safe. Its flesh contains lethal tetrodotoxin, unlike T. gigas, which is harmless to eat.1

給毒液專家

學名
Carcinoscorpius rotundicauda
類群
其他有毒動物
家人
Limulidae2
排序
Xiphosurida
各大洲
印度洋, 太平洋, 南海, 安達曼海, 孟加拉灣, 海洋
寶寶
Females lay about 3500 eggs in a hole dug in the sand or mud, and the male fertilises them. The large eggs hatch after a couple of weeks into miniature versions of the adults.1
對人的危險
4 / 5: 非常危險3

知識的出處

  1. Mangrove horseshoe crab (Wikipedia (CC BY-SA 4.0))
  2. Carcinoscorpius rotundicauda (iNaturalist): 名稱和分類。
  3. Venom Wiki: 危險等級、一般大小和速度估計都是我們自己定的。看看我們是怎麼算出來的： 我們怎麼評估危險.

這一頁的每個知識都有一個數字，指向它的出處。如果我們寫錯了，對不起，我們是動物迷，不是科學期刊。寫信到 [email protected] 告訴我們，我們會修正。

蠍子肚子餓了！ Venom Wiki 是一個人的計畫：免費、沒有廣告、沒有追蹤器。一點點小費就能幫它繼續上線。餵蠍子

同一類群的其他動物: 其他有毒動物

Japanese pufferfish其他有毒動物致命Hawksbill sea turtle其他有毒動物可能致命Greenland shark其他有毒動物只是會痛Silver-cheeked toadfish其他有毒動物致命Blackspotted puffer其他有毒動物可能致命White-spotted puffer其他有毒動物可能致命

也分布在: 印度洋

Australian box jellyfish水母和會螫人的海洋生物致命不要碰Geography cone芋螺和章魚致命Greater blue-ringed octopus芋螺和章魚致命Southern blue-ringed octopus芋螺和章魚致命Irukandji jellyfish水母和會螫人的海洋生物可能致命不要碰Reef stonefish有毒液的魚可能致命不要碰
餵蠍子小費罐，讓它保持免費