第 1244 号，共 1 402 张

Round stingray

Urobatis halleri

名字的由来： The species name halleri honours the young son of Major Granville O. Haller of the United States Army, who was stung on the foot while wading in San Diego Bay.1

只是会疼会疼，但不会对你造成严重伤害。

有毒的鱼

蜇伤吃：肉

对人的危险: 很疼可能真的很疼，但几乎从不严重。

The round stingray is a small, common ray that lives close to shore along the Pacific coast of the Americas. It is best known on the beaches of southern California, where people are sometimes stung when they accidentally step on one. Its sting is painful but not fatal.1

生活在

Northeastern Pacific Ocean, from Humboldt Bay in northern California south to Panama. Most common around southern California and the Baja Peninsula.1

太平洋, 加利福尼亚湾

首页

It lives in warm coastal and bay waters, usually less than 15 m deep, over soft mud or sand, often among eelgrass. It also occurs around rocky reefs. People most often meet it on the beaches of southern California, especially the 'Ray Bay' at the northern end of Seal Beach, which is used as a nursery ground.1

长度

31 cm (1 ft)1

最高速度

约 13 公里/小时（8.1 英里/小时）

游泳, 粗略估计

它吃什么？

Round stingrays feed mostly on benthic invertebrates (animals living on the seabed). Juveniles eat polychaete worms and small benthic crabs, and adults shift towards bivalve molluscs. They dig large pits with their pectoral disc and mouth to uncover buried prey.1

Round stingray的照片 — Round stingray。照片：michael h j c from California, USA。 CC BY-SA 2.0, Wikimedia Commons.

怎样认出它

Nearly round pectoral fin disc, usually brown or grey-brown above with pale yellow spots or reticulations (a net-like pattern)1
Some individuals are plain or black1
Underside is white to yellowish1
Short, stout tail with a long, thick, serrated stinging spine1

常被误认为： The Cortez round stingray (Urobatis maculatus) looks very similar and is sometimes sold under the same aquarium names. The round stingray can be told apart because it lacks the black spots on either side of its disc that the Cortez round stingray has.1

毒液之力

蜇伤

毒液通过蜇刺出来。

它的毒液会造成什么？

The venomous spine on its tail delivers a sting that is quite painful. The sting is not fatal.1

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。

Every year, hundreds of beachgoers along the coast of southern California are accidentally stung by round stingrays. The stings are painful but non-fatal. The injuries usually happen when people step on the ray.1

如果它蜇人

把伤口泡在热水里，水温以不烫伤为限、尽量热（先用你自己的手试一试），泡 30 到 90 分钟。去看医生，尤其是被石头鱼和魟鱼伤到时。

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。
如果被它蜇了：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加利福尼亚湾

它有多大？

它有多长？

和 10 块玩具积木排成一排一样长14 秒就能游完一个大泳池（50 米）

Round stingray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？

一名奥运游泳选手 约 8 公里/小时 (5 mph)

Round stingray 约 13 公里/小时 (8.1 mph)

一只全速游的海豚 约 35 公里/小时 (22 mph)

值得了解

事实

The tail spine is shed and replaced regularly. For most of the year the ray has only one spine, but small secondary spines begin to appear in early July, and the replacement is complete by December.1

The species name honours a boy who was stung while wading in San Diego Bay.1

Females give off a weak electric field from near the spiracles behind each eye, which attracts males.1

Females can store sperm all year round.1

Their digging uncovers buried prey for smaller fish, which gives them an important role in the ecosystem.1

给毒液专家

学名: Urobatis halleri
类别: 有毒的鱼
家人: Urotrygonidae2
排序: Myliobatiformes
大洲: 太平洋, 加利福尼亚湾, 海洋
宝宝: Round stingrays give birth to live young, in litters of 1 to 6 (average 2 to 3). The young measure 6 to 8 cm across at birth, after a gestation of about three months.1
它在野外过得怎么样: Least Concern (IUCN Red List)1
对人的危险: 2 / 5: 很疼3