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Cannonball jellyfish

Stomolophus meleagris

Om navnet: Its common name comes from its similarity to a cannonball in shape and size. Its scientific name means "many mouthed hunter".1

HarmløsHarmløs for mennesker. Intet at bekymre sig om.

Gopler & andre brændende havdyr

Brændende tentaklerSpiser: Kød

Fare for mennesker: MildSom et bistik eller mindre. Stort set harmløst for mennesker.

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

Lever i

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

Atlanterhavet, Det Caribiske Hav, Den Mexicanske Golf, Californiens Golf

Forside

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

Længde

25 cm (9,8 in)1

Tophastighed

cirka 0,7 km/t (0,44 mph)

Svømmende, groft gæt

Hvad spiser det?

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

Foto af Cannonball jellyfish — Cannonball jellyfish. Foto: Richard Stovall. CC BY 4.0, iNaturalist.

Sådan genkender du det

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

Forveksles ofte med: 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

Giftkraft

Brændende tentakler

Tusindvis af bittesmå brændeceller affyres, når noget rører ved dem.

Hvad gør dets gift, når det bider eller stikker?

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

Hvor farligt er det for mennesker?

Fare for mennesker: MildSom et bistik eller mindre. Stort set harmløst for mennesker.

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

Hvad gør det, når det er bange?

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

Hvis det stikker

Kom op af vandet, og pil alle tentakler af (med handsker eller en klud).
Ved tropiske kassegopler: Hæld eddike på stikkene i mindst 30 sekunder, ring efter hjælp, og vær klar til at give hjerte-lunge-redning (HLR). Ved portugisiske orlogsmænd og de fleste andre: Skyl med havvand, derefter varmt vand mod smerterne.

Ring altid først til dit alarmnummer (112, 000, 911). Dette er generel førstehjælpsvejledning, ikke lægelig rådgivning. Grundlæggende førstehjælp

Pas på dig selv

Rør aldrig ved, fang eller dril et vildt dyr, heller ikke et lille et, og heller ikke hvis det ser ud til at sove eller være dødt.
Giv det plads. Hvis du møder et, så bliv rolig, træd langsomt tilbage, og lad det gå sin egen vej.
Hvis et stikker dig: Bevar roen, hold dig i ro, ring til dit alarmnummer (112, 000, 911), eller kom hurtigt på hospitalet. Husk, hvordan det så ud, et billede hjælper.

Det er ikke ude efter dig. Det bruger sin gift til at fange føde eller beskytte sig selv, og det gemmer sig meget hellere. Mere om sikkerhed

Hvor i verden?

Afrika Asien Europa Nordamerika Sydamerika Australien & Oceanien Atlanterhavet Det Caribiske Hav Den Mexicanske Golf Californiens Golf

Hvor stort er det?

Hvor langt er det?

lige så lang som 8 byggeklodser på række

Hvor stor er Cannonball jellyfish i forhold til DIG?

Bare matematik i din browser. Intet bliver gemt eller sendt nogen steder hen.

Hvor hurtigt er det?

En havesnegl cirka 0,05 km/t (0,03 mph)

Cannonball jellyfish cirka 0,7 km/t (0,44 mph)

Et menneske, der svømmer cirka 3 km/t (1,9 mph)

værd at vide

Fakta

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

Myteknuser

Myte: Cannonball jellyfish are dangerous to people.

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

For gifteksperter

Videnskabeligt navn: Stomolophus meleagris
Gruppe: Gopler & andre brændende havdyr
Familie: Stomolophidae2
Orden: Rhizostomeae
Kontinenter: Atlanterhavet, Det Caribiske Hav, Den Mexicanske Golf, Californiens Golf, Oceanerne
Unger: 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
Fare for mennesker: 1 / 5: Mild3

Hvor fakta kommer fra

Cannonball jellyfish (Wikipedia (CC BY-SA 4.0))
Stomolophus meleagris (iNaturalist): navne og klassifikation.
Venom Wiki: fareniveauet, den typiske størrelse og hastighedsgættet er vores egne. Se, hvordan vi regner dem ud: Sådan vurderer vi faren.

Hvert faktum på denne side har et nummer, der peger på kilden. Hvis vi har taget fejl, så undskyld, vi er dyrefans, ikke et videnskabeligt tidsskrift. Skriv til os på [email protected], så retter vi det.

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