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Savigny's long-spined urchin

Diadema savignyi
Davart il num: The species name honours Marie Jules César Savigny, a French zoologist who described many new marine species from the Mediterranean and Red Sea.1
Fa mo malBetg tutgarQuai fa mal, ma i na ta fa nagin donn serius.
Ritschs, stailas e verms Spinas tissientadasMangia: Plantas
Privel per umans: DolurusQuai po far propi mal, ma i n'è bunamain mai grav.

Savigny's long-spined urchin is a spiny sea animal that lives on reefs and in shallow lagoons. It has very long, thin spines that can grow up to 25 cm, and it comes out at night to graze on algae. Its spines are the part that can hurt people, so it is worth giving it plenty of room.1

Viva en
East coast of Africa, Red Sea, Indian Ocean, western Pacific, French Polynesia, Hawaii, New Caledonia and northern Australia1
Ocean Indic, Ocean Pacific, Mar Cotschen, Mar Arab e Golf Persic, Mar da Timor e d'Arafura, Golf dal Bengal
Pagina iniziala
It is found on mixed sandy, rocky and coral seabed, especially in places disturbed by storms or other natural events. It lives from the surface down to about 70 metres deep. It often hides in crevices or under boulders during the day.1
Lunghezza
9 cm (3,5 in)1
Sveltezza maximala
circa 0,02 km/h (0,01 mph)
Nudar, stima approximativa
Tge mangia el?
It feeds at dusk on the algal mat that grows over the seabed, tearing it up as it grazes. This helps keep algae from overwhelming corals.1
Propi!Foto da Savigny's long-spined urchin
Savigny's long-spined urchin. Foto: Anders Poulsen, Deep Blue (http://www.colours.dk/). CC BY-SA 3.0, Wikimedia Commons.

Co renconuscher el

  • Usually black, with a rounded body (called a test) up to about 9 cm across1
  • Long, thin, hollow spines that grow in tufts and can reach 25 cm; they are usually black but can be grey, dark brown or purple1
  • Juveniles may have bands of lighter and darker shades, and the occasional individual is completely white1
  • Iridescent green or blue lines around the interambulacral areas and around the periproct (the cone-shaped region surrounding the anus)1

Savens confundì cun: It is very similar to Diadema setosum, which shares much of its range and often lives in the same groups. Savigny's long-spined urchin lacks the thin orange ring around the periproct that Diadema setosum has.1

Forza dal tissi

Spinas tissientadas

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

Quant privlus è el per umans?

Privel per umans: DolurusQuai po far propi mal, ma i n'è bunamain mai grav.

Tge fa el, cura ch'el ha tema?

When a shadow falls on it, it angles its spines towards the possible attacker.1

Sche sias spinas ta furan

  • 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 Arab e Golf PersicMar da Timor e d'ArafuraGolf dal Bengal

Quant grond è el?

Quant lung è el?

Savigny's long-spined urchin circa 9 cm lung (3,5 in)In clip da palpiri circa 3 cm (1,2 in)In smartphone circa 15 cm (5,9 in)
uschè lung sco 3 bluccs da construcziun in suenter l'auterpli plaun ch'ina lindorna da curtin

Quant grond è Savigny's long-spined urchin cumpareglià cun TAI?

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

Quant svelt è el?

bun da savair

Fatgs

1

Its spines are brittle, thin and hollow, and grow in tufts that can be as long as 25 cm.1

2

Small fish such as cardinal fish, flatworms and shrimps sometimes shelter among its long spines.1

3

It spawns just after the full moon, while its close relative Diadema setosum mostly spawns around days eight to ten of the lunar cycle, which keeps the two species from interbreeding.1

4

Its grazing helps control algae, which might otherwise smother corals.1

5

It is nocturnal, hiding in crevices or under boulders by day, though several individuals sometimes huddle together in the open.1

6

Its predators include pufferfish, porcupinefish, lobsters and snails.1

Per experts da tissi

Num scientific
Diadema savignyi
Gruppa
Ritschs, stailas e verms
Famiglia
Diadematidae2
Urden
Diadematoida
Continents
Ocean Indic, Ocean Pacific, Mar Cotschen, Mar Arab e Golf Persic, Mar da Timor e d'Arafura, Golf dal Bengal, Ils oceans
Poppins
It does not have live young. Instead it releases eggs and sperm into the water (spawning), mainly during the north-east monsoon period, peaking in May, and timed to the lunar cycle.1
Privel per umans
2 / 5: Dolurus3

Da nua che vegnan ils fatgs

  1. Diadema savignyi (Wikipedia (CC BY-SA 4.0))
  2. Diadema savignyi (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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