Crown-of-thorns starfish
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

Bí o ṣe lè dá a mọ̀
- 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
A sábà máa ń ṣì í mọ̀ sí: 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
Agbára oró
Ẹ̀gún mímú ló ń gbé oró náà. Títẹ̀ ẹ́ mọ́lẹ̀ tàbí dídì í mú máa ń dunni.
Kí ni oró rẹ̀ máa ń ṣe?
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
Báwo ló ṣe léwu tó fún ènìyàn?
Ewu fún ènìyàn: Ó le gan-anBí ẹ̀gún rẹ̀ bá gún ọ, lọ rí dókítà. Ikú kò wọ́pọ̀ rárá.The spines can cause sharp pain, long-lasting bleeding, nausea and swelling. Brittle spines can break off and stay in the tissue.1
Bí ẹ̀gún rẹ̀ bá gún ọ
- Spines that become embedded in the tissue must be removed surgically.1
- Fi ọgbẹ́ náà sínú omi gbígbóná, tó gbóná tó bí ẹni náà ṣe lè fara dà á láìjóná, kí o sì wá ìrànlọ́wọ́ ìṣègùn láti yọ ẹ̀gún náà. Má ṣe gbẹ́ wọn jáde fúnra rẹ.
Máa kọ́kọ́ pe nọ́ńbà pàjáwìrì rẹ nígbà gbogbo (112, 000, 911). Èyí jẹ́ ìtọ́sọ́nà ìtọ́jú àkọ́kọ́ gbogbogbò, kì í ṣe ìmọ̀ràn ìṣègùn. Ìpìlẹ̀ ìtọ́jú àkọ́kọ́
Wà láìléwu
- Má ṣe fọwọ́ kan, mú tàbí yọ ẹranko igbó lẹ́nu láéláé, kódà bí ó bá kéré, kódà bí ó bá dà bí ẹni pé ó ń sùn tàbí ó ti kú.
- Fún un ní àyè. Bí o bá pàdé ọ̀kan, farabalẹ̀, sẹ́yìn díẹ̀díẹ̀ kí o sì jẹ́ kí ó máa bá ọ̀nà rẹ̀ lọ.
- Bí ẹ̀gún rẹ̀ bá gún ọ: farabalẹ̀, má ṣe mira, pe nọ́ńbà pàjáwìrì rẹ (112, 000, 911) tàbí lọ sí ilé ìwòsàn kíákíá. Rántí bí ó ṣe rí, fọ́tò máa ń ṣèrànwọ́.
Kò wá ọ kiri láti ṣe ọ́ léṣe. Ó ń lo oró rẹ̀ láti mú oúnjẹ tàbí láti dáàbò bo ara rẹ̀, ó sì fẹ́ràn láti farapamọ́ jù. Sí i nípa wíwà láìléwu
Níbo ní ayé?
Báwo ló ṣe tóbi tó?
Báwo ló ṣe gùn tó?
ó gùn tó bíríkì ìṣeré 11 tí a tò sí ìlà kan
ó lọ́ra ju ìgbín inú ọgbà lọBáwo ni Crown-of-thorns starfish ṣe tóbi tó tí a bá fi wé ÌWỌ?
Ìṣirò nìkan nínú bráwúsà rẹ. A kò fi ohunkóhun pamọ́, a kò sì fi ránṣẹ́ sí ibikíbi.
Báwo ló ṣe yára tó?
Òtítọ́
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
Olùfọ́ àròsọ
Àròsọ: Its spines inject venom like a snake or stinging animal.
Òtítọ́: It has no mechanism for injecting toxin. Its spines pierce skin and leave saponin-containing tissue in the wound.1
Fún àwọn amòye oró
- Orúkọ sáyẹ́ǹsì
- Acanthaster planci
- Ẹgbẹ́
- Sea urchin, ẹja ìràwọ̀ àti kòkòrò inú òkun
- Ìdílé
- Acanthasteridae2
- Ètò
- Valvatida
- Àwọn kọ́ńtínẹ́ńtì
- Òkun Íńdíà, Òkun Pàsífíìkì, Òkun Pupa, Òkun Coral, Òkun Fílípínì, Òkun Gúúsù Ṣáínà, Òkun Andaman, Òkun Arébíà àti Ìyawọlẹ̀ Òkun Páṣíà, Òkun Tímọ̀ àti Òkun Àráfúrà, Ìyawọlẹ̀ Òkun Bẹ̀ngál, Àwọn òkun ńlá
- Àwọn ọmọ
- 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
- Ewu fún ènìyàn
- 3 / 5: Ó le gan-an3
Ibi tí àwọn òtítọ́ ti wá
- Crown-of-thorns starfish (Wikipedia (CC BY-SA 4.0))
- Acanthaster planci (iNaturalist): orúkọ àti ìpínsísọ̀rí.
- Venom Wiki: ìpele ewu, ìtóbi déédé àti àfojúbù ìyára jẹ́ tiwa. Wo bí a ṣe ń ṣírò wọn: Bí a ṣe ń díwọ̀n ewu.
Gbogbo òtítọ́ ojú-ìwé yìí ní nọ́ńbà tó tọ́ka sí orísun rẹ̀. Bí a bá ṣe àṣìṣe, má bínú, olólùfẹ́ ẹranko ni wá, kì í ṣe ìwé ìròyìn sáyẹ́ǹsì. Sọ fún wa ní [email protected] a ó sì tún un ṣe.
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