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Crown-of-thorns starfish

Acanthaster planci

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

Ọ chọrọ dọkịtaEmetụla ya akaỌ naghị egbukarị egbu, mana ọ bụrụ na mkpu ya dụrụ gị, gaa n'ebe dọkịta.

Urchin, kpakpando osimiri na ikpuru

Mkpu na-agba nsịNri ya: Anụ

Ihe ize ndụ nye mmadụ: Ọ dị njọỌ bụrụ na mkpu ya dụrụ gị, gaa n'ebe dọkịta. Ọnwụ anaghị adịkarị ma ọlị.

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

Ebe obibi

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

Oké Osimiri India, Oké Osimiri Pasifik, Osimiri Uhie, Osimiri Coral, Osimiri Filipin, Osimiri Ndịda China, Osimiri Andaman, Osimiri Arabia na Ọwara Peshia, Osimiri Timor na Arafura, Ọwara Bengal

Ụlọ

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

Ogologo

25 cm ruo 35 cm (9.8 in ruo 1.1 ft)1

Ọsọ kacha elu

ihe dị ka 0.02 km/h (0.01 mph)

Igwu mmiri, nchepụta

Gịnị ka ọ na-eri?

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

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

Otú ị ga-esi mata ya

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 na-agwakọkarị ya 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

Ike nsị

Mkpu na-agba nsị

Mkpu dị nkọ na-ebu nsị ahụ. Ịzọ ya ụkwụ ma ọ bụ ijide ya na-afụ ụfụ.

Gịnị ka nsị ọ na-agba na-eme?

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

Kedu otú o si dị egwu nye mmadụ?

Ihe ize ndụ nye mmadụ: Ọ dị njọỌ bụrụ na mkpu ya dụrụ gị, gaa n'ebe dọkịta. Ọnwụ anaghị adịkarị ma ọlị.

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

Ọ bụrụ na mkpu ya dụrụ gị

Spines that become embedded in the tissue must be removed surgically.1
Tinye ọnya ahụ n'ime mmiri ọkụ, nke ọkụ dị ka onye ahụ nwere ike ịnagide n'ere ya ọkụ, chọọkwa enyemaka ọgwụ iji wepụ mkpu ndị ahụ. Egwula ha n'onwe gị.

Na-ebu ụzọ kpọọ nọmba mberede gị mgbe niile (112, 000, 911). Nke a bụ ndụmọdụ enyemaka mbụ n'ozuzu, ọ bụghị ndụmọdụ ọgwụ. Isi ihe enyemaka mbụ

Nọrọ na nchekwa

Emetụla anụ ọhịa aka, ejidela ya, emekwala ya ihe ọjọọ, ọbụna obere, ọbụna ma ọ dị ka ọ na-ehi ụra ma ọ bụ nwụọ anwụ.
Nye ya ohere. Ọ bụrụ na ị zutere otu, dị jụụ, laghachi azụ nwayọ, hapụ ya ka ọ gaa ụzọ ya.
Ọ bụrụ na mkpu ya dụrụ gị: dị jụụ, emegharịla ahụ, kpọọ nọmba mberede gị (112, 000, 911) ma ọ bụ gaa ụlọ ọgwụ ngwa ngwa. Cheta ka o si dị, foto na-enye aka.

Ọ naghị achụ gị. Ọ na-eji nsị ya ejide nri ma ọ bụ chebe onwe ya, ọ ga-akakwa mma n'anya ya ịzo onwe ya. Ihe ndị ọzọ gbasara ịnọ na nchekwa

Ebee n'ụwa?

Afrịka Eshia Yurop Ugwu Amerika Ndịda Amerika Ọstrelia na Oshenia Oké Osimiri Pasifik Oké Osimiri India Osimiri Uhie Osimiri Coral Osimiri Ndịda China Osimiri Filipin Osimiri Andaman Osimiri Arabia na Ọwara Peshia Osimiri Timor na Arafura Ọwara Bengal

Ọ hà aṅaa?

Kedu otú o si dị ogologo?

dị ogologo dị ka blọk egwuregwu 11 n'ahịrịnwayọ karịa ejula ubi

Kedu otú Crown-of-thorns starfish si hà ma e jiri ya tụnyere GỊ?

Naanị mgbakọ na mwepụ n'ime browser gị. Ọ dịghị ihe echekwara ma ọ bụ ezigara ebe ọ bụla.

Kedu otú o si agba ọsọ?

Ịnyịnya osimiri (seahorse) ihe dị ka 0.0015 km/h (0 mph)

Crown-of-thorns starfish ihe dị ka 0.02 km/h (0.01 mph)

Ejula ubi ihe dị ka 0.05 km/h (0.03 mph)

ọ dị mma ịmara

Eziokwu

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

Onye na-ekpughe akụkọ ụgha

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

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

Maka ndị ọkachamara nsị

Aha sayensị: Acanthaster planci
Otu: Urchin, kpakpando osimiri na ikpuru
Ezinụlọ: Acanthasteridae2
Usoro: Valvatida
Kọntinent dị iche iche: Oké Osimiri India, Oké Osimiri Pasifik, Osimiri Uhie, Osimiri Coral, Osimiri Filipin, Osimiri Ndịda China, Osimiri Andaman, Osimiri Arabia na Ọwara Peshia, Osimiri Timor na Arafura, Ọwara Bengal, Oké osimiri niile
Ụmụ ọhụrụ: 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
Ihe ize ndụ nye mmadụ: 3 / 5: Ọ dị njọ3

Ebe eziokwu ndị a si

Crown-of-thorns starfish (Wikipedia (CC BY-SA 4.0))
Acanthaster planci (iNaturalist): aha na nhazi ọkwa.
Venom Wiki: ọkwa ihe ize ndụ, nha nkịtị na nchepụta ọsọ bụ nke anyị. Lee otú anyị si achọpụta ha: Otú anyị si atụ ihe ize ndụ.

Eziokwu ọ bụla dị na peeji a nwere nọmba na-egosi ebe o si. Ọ bụrụ na anyị mehiere ihe, ndo, anyị bụ ndị hụrụ anụmanụ n'anya, ọ bụghị akwụkwọ akụkọ sayensị. Gwa anyị na [email protected], anyị ga-edozi ya.

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