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Cannonball jellyfish 的卡通圖
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Cannonball jellyfish

Stomolophus meleagris
名字的由來： Its common name comes from its similarity to a cannonball in shape and size. Its scientific name means "many mouthed hunter".1
無害對人無害。不用擔心。
水母和會螫人的海洋生物 會螫人的觸手吃：肉
對人的危險: 輕微跟蜜蜂螫差不多或更輕微。對人基本上無害。

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

分布在
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, 墨西哥灣, 加利福尼亞灣
首頁
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
長度
25 cm (9,8 in)1
最高速度
大約 0,7 km/h（0,44 mph）
游泳, 粗略估計
牠吃什麼？
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
是真的！Cannonball jellyfish 的照片
Cannonball jellyfish。照片：Richard Stovall。 CC BY 4.0, iNaturalist.

怎麼認出牠

  • 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

常被誤認為： 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

毒液力量

會螫人的觸手

有東西碰到時，成千上萬個小小的刺細胞就會發射。

牠的毒液有什麼作用？

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

牠對人有多危險？

對人的危險: 輕微跟蜜蜂螫差不多或更輕微。對人基本上無害。

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

牠害怕時會做什麼？

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

如果牠螫人

  • 離開水裡，把觸手拿掉（戴手套或用布）。
  • 熱帶箱形水母：在螫傷處倒醋至少 30 秒，求救，並準備好做心肺復甦術（CPR）。藍瓶水母和大多數其他水母：用海水沖洗，再用熱水止痛。

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大西洋加勒比海墨西哥灣加利福尼亞灣

牠有多大？

牠有多長？

Cannonball jellyfish 大約 25 cm 長 (9,8 in)一根香蕉 大約 18 cm (7,1 in)一隻家貓 大約 50 cm (1,6 ft)
跟 8 塊玩具積木排成一排一樣長

Cannonball jellyfish 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

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

2

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

3

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

4

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

破解迷思

迷思： 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

給毒液專家

學名
Stomolophus meleagris
類群
水母和會螫人的海洋生物
家人
Stomolophidae2
排序
Rhizostomeae
各大洲
大西洋, 加勒比海, 墨西哥灣, 加利福尼亞灣, 海洋
寶寶
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
對人的危險
1 / 5: 輕微3

知識的出處

  1. Cannonball jellyfish (Wikipedia (CC BY-SA 4.0))
  2. Stomolophus meleagris (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。

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同一類群的其他動物: 水母和會螫人的海洋生物

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也分布在: 大西洋

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