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Crown-of-thorns starfish

Acanthaster planci
Davart il num: Its common name comes from the long, thornlike spines that cover its upper surface, which resemble the biblical crown of thorns.1
Dovra in mediBetg tutgarDarar mortal, ma sche sias spinas ta furan, va tar in medi.
Ritschs, stailas e verms Spinas tissientadasMangia: Charn
Privel per umans: GravSche sias spinas ta furan, va tar in medi. Cas da mort èn fitg rars.

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

Viva en
Indo-Pacific: Red Sea, East African coast, Indian Ocean, Pacific Ocean to west coast of Central America; most common around Australia1
Ocean Indic, Ocean Pacific, Mar Cotschen, Mar da Coral, Mar da las Filippinas, Mar da la China dal Sid, Mar d'Andaman, Mar Arab e Golf Persic, Mar da Timor e d'Arafura, Golf dal Bengal
Pagina iniziala
It lives where coral reefs or hard coral communities occur in tropical and subtropical waters.1
Lunghezza
25 cm fin 35 cm (9,8 in fin 1,1 ft)1
Sveltezza maximala
circa 0,02 km/h (0,01 mph)
Nudar, stima approximativa
Tge mangia el?
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
Propi!Foto da Crown-of-thorns starfish
Crown-of-thorns starfish. Foto: John Hepburn. CC BY 4.0, Wikimedia Commons.

Co renconuscher el

  • 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

Savens confundì cun: 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

Forza dal tissi

Spinas tissientadas

Spinas pizzadas portan il tissi. Sch'ins passa sin el u al piglia, fa quai mal.

Tge fa ses tissi?

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

Quant privlus è el per umans?

Privel per umans: GravSche sias spinas ta furan, va tar in medi. Cas da mort èn fitg rars.

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

Sche sias spinas ta furan

  • Spines that become embedded in the tissue must be removed surgically.1
  • Metta la plaja en aua chauda, uschè chauda sco che la persuna po supportar senza sa brischar, e tschertga agid medicinal per allontanar las spinas. N'emprova betg da las chavar ora sez.

Clama adina l'emprim tes numer d'urgenza (112, 000, 911). Quai è in cussegl general d'emprim agid, betg in cussegl medicinal. Basa da l'emprim agid

Resta en segirezza

  • Na tutga, na piglia e na tizza mai in animal selvadi, gnanc in pitschen, ed era sch'el para da durmir u d'esser mort.
  • Dà spazi a l'animal. Sche ti scuntras in, resta calm, va plaun enavos e lascha ir el per sia via.
  • Sche sias spinas ta furan: resta calm, na ta mova betg, clama tes numer d'urgenza (112, 000, 911) u va spert en in ospital. Ta regorda co ch'el veseva or, ina foto gida.

El n'ha betg quai sin tai. El dovra ses tissi per pigliar nutriment u per sa defender, e sa zuppa bler pli gugent. Dapli davart la segirezza

Nua sin il mund?

AfricaAsiaEuropaAmerica dal NordAmerica dal SidAustralia ed OceaniaOcean PacificOcean IndicMar CotschenMar da CoralMar da la China dal SidMar da las FilippinasMar d'AndamanMar Arab e Golf PersicMar da Timor e d'ArafuraGolf dal Bengal

Quant grond è el?

Quant lung è el?

Crown-of-thorns starfish circa 35 cm lung (1,1 ft)Ina banana circa 18 cm (7,1 in)In giat da chasa circa 50 cm (1,6 ft)
uschè lung sco 11 bluccs da construcziun in suenter l'auterpli plaun ch'ina lindorna da curtin

Quant grond è Crown-of-thorns starfish cumpareglià cun TAI?

Mo matematica en tes navigatur. Nagut na vegn memorisà u tramess.

Quant svelt è el?

bun da savair

Fatgs

1

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

2

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

3

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

4

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

5

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

Destructur da mits

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

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

Per experts da tissi

Num scientific
Acanthaster planci
Gruppa
Ritschs, stailas e verms
Famiglia
Acanthasteridae2
Urden
Valvatida
Continents
Ocean Indic, Ocean Pacific, Mar Cotschen, Mar da Coral, Mar da las Filippinas, Mar da la China dal Sid, Mar d'Andaman, Mar Arab e Golf Persic, Mar da Timor e d'Arafura, Golf dal Bengal, Ils oceans
Poppins
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
Privel per umans
3 / 5: Grav3

Da nua che vegnan ils fatgs

  1. Crown-of-thorns starfish (Wikipedia (CC BY-SA 4.0))
  2. Acanthaster planci (iNaturalist): nums e classificaziun.
  3. Venom Wiki: il stgalim da privel, la grondezza tipica e la stima da la sveltezza èn noss agens. Guarda co che nus als calculain: Co che nus valitain il privel.

Mintga fatg sin questa pagina ha in numer che renvia a sia funtauna. Sche nus avain fatg in sbagl, perstgisa, nus essan fans d'animals, betg ina revista scientifica. Scriva a nus a [email protected] e nus curregin.

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