第 1254 號，共 1 402 號

Discus ray

Paratrygon aiereba

需要看醫生很少致命，但被螫了需要看醫生。

螫吃：肉

The discus ray is a large freshwater stingray that lives in the Amazon river basin in South America. It has a flat, round body shaped like a lily pad, and it is one of the biggest rays in its family. It is a top predator in its river home.1

分布在

Amazon basin, South America1

南美洲

首頁

A river stingray that lives in freshwater. Adults stay in relatively deep water in the main river channels and move into shallower water to feed at night. Young rays are found in shallow water at sandy beaches and in creeks.1

長度

1,6 m (5,2 ft)1

體重

110 kg (243 lb)1

最高速度

大約 24 km/h（15 mph）

游泳, 粗略估計

牠吃什麼？

It mainly feeds on fish, but also eats invertebrates such as insects and crustaceans. It moves into shallower water to feed at night.1

Discus ray 的照片 — Discus ray。照片：Sergey.A [email protected] Israel。 CC BY 3.0, Wikimedia Commons.

怎麼認出牠

Disc shaped roughly like a lily pad, with a slightly concave (dipped) snout1
Brownish colour on top1
Dark vermiculated or reticulated pattern (worm-like or net-like markings) across the upper body1
Small eyes1
Adults can reach a disc width of 1.6 m1

毒液力量

螫

毒液從螫針出來。

牠對人有多危險？

對人的危險: 嚴重被螫了需要看醫生。死亡案例非常罕見。

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（先用你自己的手試水溫），泡 30 到 90 分鐘。要就醫，特別是被石頭魚和魟魚刺傷時。

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

牠有多大？

牠有多長？

牠有多重？

跟 6 隻狗一樣重

跟 3 隻家貓從鼻子接到尾巴一樣長跟 9 根香蕉頭尾相接一樣長可以在 7,5 秒內游完一座大游泳池（50 公尺）

Discus ray 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？

奧運游泳選手 大約 8 km/h (5 mph)

Discus ray 大約 24 km/h (15 mph)

全速前進的海豚 大約 35 km/h (22 mph)

值得知道

小知識

It can weigh up to 110 kg.1

It is a top predator in its river habitat.1

The female carries her young for nine months and gives birth to an average of two.1

The discus ray is one of the largest species in its family of stingrays.1

Its disc is shaped roughly like a lily pad, which gives it its name.1

破解迷思

迷思： Discus rays grow much larger than 1.6 m across.

真相： Reports of much larger individuals are unconfirmed and are considered highly questionable. Most individuals do not grow wider than 1.3 m across the disc.1

給毒液專家

學名: Paratrygon aiereba
類群: 有毒液的魚
家人: Potamotrygonidae2
排序: Myliobatiformes
各大洲: 南美洲
寶寶: After a nine-month pregnancy, the female gives birth to an average of two young, each with a disc width of about 16 cm.1
對人的危險: 3 / 5: 嚴重3