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Crown-of-thorns starfish

Acanthaster planci

Ibyerekeye izina: Its common name comes from the long, thornlike spines that cover its upper surface, which resemble the biblical crown of thorns.1

Bisaba mugangaNtukayikorehoNi gake yica, ariko niba amahwa yayo akujombye, jya kwa muganga.

Oursins, inyenyeri zo mu nyanja n'inyo

Amahwa afite ubumaraIrya: Inyama

Akaga ku bantu: IkomeyeNiba amahwa yayo akujombye, jya kwa muganga. Abapfa ni bake cyane.

The crown-of-thorns starfish is a large starfish with long, sharp spines that look like a crown of thorns. It lives on coral reefs across the Indo-Pacific, from the Red Sea to the west coast of Central America, and it is most common around Australia. It feeds on hard coral, so it can change the reefs it lives on.1

Iba muri

Indo-Pacific: Red Sea, East African coast, Indian Ocean, Pacific Ocean to west coast of Central America; most common around Australia1

Inyanja y'Abahinde, Inyanja ya Pasifika, Inyanja Itukura, Inyanja ya Korali, Inyanja ya Filipine, Inyanja y'Amajyepfo y'u Bushinwa, Inyanja ya Andamani, Inyanja ya Arabiya n'Ikigobe cy'Ubuperesi, Inyanja ya Timor na Arafura, Ikigobe cya Bengali

Ahabanza

It lives where coral reefs or hard coral communities occur in tropical and subtropical waters.1

Uburebure

25 cm kugeza kuri 35 cm (9,8 in kugeza kuri 1,1 ft)1

Umuvuduko wo hejuru

hafi 0,02 km/h (0,01 mph)

Koga, ikigereranyo cy'ugereranyije

Irya iki?

It is a coral predator that climbs onto living coral using its tube feet and pushes its stomach out over the coral. Digestive enzymes turn the coral tissue into liquid, which it absorbs, leaving a white scar of bare skeleton.1

Ifoto ya Crown-of-thorns starfish — Crown-of-thorns starfish. Ifoto: John Hepburn. CC BY 4.0, Wikimedia Commons.

Uko wayimenya

Adults are normally 25 to 35 cm across.1
Up to 21 arms, with long, stiff, very sharp spines that are 4 to 5 cm long on the top and sides of the arms.1
Colour varies with diet or region: purple, purple-blue, reddish grey or brown with red spine tips, or green with yellow spine tips.1
The body is flexible and can bend and twist around coral surfaces.1

Ikunze kwitiranywa na: A close relative, Acanthaster brevispinus, lives on soft sea floors at moderate depths rather than on coral reefs. The two are considered sibling species.1

Imbaraga z'ubumara

Amahwa afite ubumara

Amahwa atyaye ni yo atwara ubumara. Kuyikandagira cyangwa kuyifata birababaza.

Ubumara bwayo bukora iki?

The spines do not inject venom. When they pierce skin, tissue containing saponins (detergent-like chemicals) is left in the wound. In humans this causes a sharp, stinging pain that can last several hours, persistent bleeding, and nausea and swelling that may last a week or more.1

Iteje akaga kangana iki ku bantu?

Akaga ku bantu: IkomeyeNiba amahwa yayo akujombye, jya kwa muganga. Abapfa ni bake cyane.

The spines can cause sharp pain, long-lasting bleeding, nausea and swelling. Brittle spines can break off and stay in the tissue.1

Niba amahwa yayo akujombye

Spines that become embedded in the tissue must be removed surgically.1
Shyira igikomere mu mazi ashyushye, ashyushye uko umuntu abyihanganira atiriwe ashya, kandi ushake ubufasha bwa muganga kugira ngo amahwa avanwemo. Ntukayacukure ubwawe.

Buri gihe banza uhamagare nimero y'ubutabazi (112, 000, 911). Izi ni inama rusange z'ubutabazi bw'ibanze, si inama za muganga. Ibanze by'ubutabazi bw'ibanze

Irinde akaga

Ntuzigere ukora, ufata cyangwa ushotora inyamaswa yo mu gasozi, nubwo yaba ntoya, kandi nubwo yasa n'isinziriye cyangwa yapfuye.
Yihe umwanya. Niba uhuye n'imwe, tuza, usubire inyuma buhoro buhoro kandi uyireke yigendere.
Niba amahwa yayo akujombye: tuza, ntunyeganyege, hamagara nimero y'ubutabazi (112, 000, 911) cyangwa ujye ku bitaro vuba. Ibuka uko yasaga, ifoto irafasha.

Ntigushakisha ngo ikugirire nabi. Ikoresha ubumara bwayo kugira ngo ifate ibyo kurya cyangwa yirinde, kandi ikunda cyane kwihisha. Ibindi ku kwirinda

Ni hehe ku isi?

Afurika Aziya Uburayi Amerika y'Amajyaruguru Amerika y'Amajyepfo Ositaraliya na Oseyaniya Inyanja ya Pasifika Inyanja y'Abahinde Inyanja Itukura Inyanja ya Korali Inyanja y'Amajyepfo y'u Bushinwa Inyanja ya Filipine Inyanja ya Andamani Inyanja ya Arabiya n'Ikigobe cy'Ubuperesi Inyanja ya Timor na Arafura Ikigobe cya Bengali

Ingana gute?

Ireshya ite?

ireshya n'ibice 11 by'ibikinisho byo kubaka biri ku murongoitinda kurusha ikinyamushongo cyo mu murima

Crown-of-thorns starfish ingana ite ugereranyije NAWE?

Ni imibare gusa ikorerwa muri mudasobwa yawe. Nta kintu kibikwa cyangwa cyoherezwa ahandi.

Yihuta gute?

Ifarashi yo mu nyanja hafi 0,0015 km/h (0 mph)

Crown-of-thorns starfish hafi 0,02 km/h (0,01 mph)

Ikinyamushongo cyo mu murima hafi 0,05 km/h (0,03 mph)

bikwiye kumenywa

Ibintu by'ukuri

An individual starfish can consume up to 6 square metres of living coral reef per year.1

When taken out of water, its soft body ruptures and collapses, but its spines can recover their shape if it is put back in the water while still alive.1

Its body contains detergent-like saponins, so keeping starfish in small volumes of water with aeration produces large amounts of foam.1

It is one of the largest starfish in the world.1

It has lost the usual five-fold symmetry of starfish as it grew more arms, although it begins life with five-fold symmetry.1

Usenya ibinyoma

Ikinyoma: Its spines inject venom like a snake or stinging animal.

Ukuri: It has no mechanism for injecting toxin. Its spines pierce skin and leave saponin-containing tissue in the wound.1

Ku bahanga mu by'ubumara

Izina rya siyansi: Acanthaster planci
Itsinda: Oursins, inyenyeri zo mu nyanja n'inyo
Umuryango: Acanthasteridae2
Itsinda rinini (order): Valvatida
Imigabane: Inyanja y'Abahinde, Inyanja ya Pasifika, Inyanja Itukura, Inyanja ya Korali, Inyanja ya Filipine, Inyanja y'Amajyepfo y'u Bushinwa, Inyanja ya Andamani, Inyanja ya Arabiya n'Ikigobe cy'Ubuperesi, Inyanja ya Timor na Arafura, Ikigobe cya Bengali, Inyanja ngari
Abana bato: It releases vast amounts of eggs and sperm (gametes) during mass spawning events in summer, and the eggs contain saponins similar to those in adults.1
Akaga ku bantu: 3 / 5: Ikomeye3

Aho ibintu bivugwa bituruka

Crown-of-thorns starfish (Wikipedia (CC BY-SA 4.0))
Acanthaster planci (iNaturalist): amazina n'ibyiciro.
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