第 1105 号，共 1 402 张

Cannonball jellyfish

Stomolophus meleagris

名字的由来： Its common name comes from its similarity to a cannonball in shape and size. Its scientific name means "many mouthed hunter".1

无害对人无害。不用担心。

水母和海中蜇人生物

会蜇人的触手吃：肉

对人的危险: 轻微像被蜜蜂蜇一下或更轻。对人基本无害。

The cannonball jellyfish is a round, dome-shaped jellyfish that looks a bit like a cannonball. It lives in warm coastal waters on both sides of the Americas and in parts of Asia, and it is common in shallow water near the coast. It matters because it is one of the most common causes of minor jellyfish stings in US and Caribbean waters.1

生活在

Southeastern US coast and Gulf of Mexico, Atlantic from New England to Brazil, Pacific from California to Ecuador, and from the Sea of Japan to the South China Sea1

大西洋, 加勒比海, 墨西哥湾, 加利福尼亚湾

首页

They live in shallow inshore waters. On the southeast coast of the United States they are extremely abundant in the summer and fall, when they make up over 16% of the biomass in shallow inshore areas. This is when people are most likely to meet them while swimming.1

长度

25 cm (9.8 in)1

最高速度

约 0.7 公里/小时（0.44 英里/小时）

游泳, 粗略估计

它吃什么？

They mainly eat zooplankton, such as veligers, and also all forms of red drum larvae. They catch prey with their oral arms, which also help them move.1

Cannonball jellyfish的照片 — Cannonball jellyfish。照片：Richard Stovall。 CC BY 4.0, iNaturalist.

怎样认出它

Dome-shaped bell that can reach 25 cm in diameter1
The rim of the bell is often coloured with brown pigment1
A cluster of oral arms under the body, extending out around the mouth1
Some related species found in the Pacific and South Atlantic are pale to blue in colour1

常被误认为： Several undescribed Stomolophus species in the Pacific and South Atlantic have pale to blue pigment. They are genetically different from the cannonball jellyfish of the North Atlantic, but they are often misidentified as that species.1

毒液之力

会蜇人的触手

一碰到东西，成千上万个小刺细胞就会发射。

它的毒液会造成什么？

They release a mucus from their nematocysts (stinging cells) that contains a toxin when disturbed. The toxin can cause irregular heart rhythms and problems in the heart's conduction pathways, although this is not common in people. Contact with the nematocysts can be very painful and may cause redness and swelling, and the toxin is also harmful to the eyes.1

它对人有多危险？

对人的危险: 轻微像被蜜蜂蜇一下或更轻。对人基本无害。

Cannonball jellyfish are mostly harmless to people. Contact usually causes slight itching or minor eye irritation. They are among the most common causes of minor stings in US and Caribbean waters. Their toxin can cause heart problems in animals and humans, but this does not usually happen.1

它害怕时会做什么？

When disturbed, they release a toxic mucus from their nematocysts, which harms small fish nearby and drives away most predators.1

如果它蜇人

离开水面，取下所有触手（戴手套或用布）。
热带箱水母：在蜇伤处倒醋至少 30 秒，呼救，并准备好做心肺复苏。僧帽水母和大多数其他水母：先用海水冲洗，再用热水止痛。

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大西洋加勒比海墨西哥湾加利福尼亚湾

它有多大？

它有多长？

和 8 块玩具积木排成一排一样长

Cannonball jellyfish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？

一只花园蜗牛 约 0.05 公里/小时 (0.03 mph)

Cannonball jellyfish 约 0.7 公里/小时 (0.44 mph)

一个在游泳的人 约 3 公里/小时 (1.9 mph)

值得了解

事实

Juvenile portly spider crabs often live in the bell, eating some of the food the jellyfish catches. The jellyfish is not harmed because it can regenerate its tissue. One jellyfish has been seen with up to ten crabs in its bell.1

Jellyfish are commercially harvested as food. In Georgia, jellyball fishing is the state's third largest commercial fishery.1

The endangered leatherback sea turtle is one of their main predators.1

In 2012, El Golfo de Santa Clara in Mexico harvested 20,000 tons of these jellyfish from late April to early July.1

谣言粉碎机

谣言： Cannonball jellyfish are dangerous to people.

真相： They are mostly harmless to people. Contact usually causes only slight itching or minor eye irritation.1

给毒液专家

学名: Stomolophus meleagris
类别: 水母和海中蜇人生物
家人: Stomolophidae2
排序: Rhizostomeae
大洲: 大西洋, 加勒比海, 墨西哥湾, 加利福尼亚湾, 海洋
宝宝: They can reproduce sexually or asexually. Sexual reproduction happens when a cannonball shoots sperm from its mouth and another cannonball catches it. The embryos develop in pouches on the oral arms, then the larvae settle on hard surfaces and grow into polyps.1
对人的危险: 1 / 5: 轻微3