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Black long-spined urchin

Diadema setosum

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.

The black long-spined urchin is a sea urchin with very long, hollow spines. It lives on coral reefs, sand flats and seagrass beds across the Indo-Pacific, and it is one of the most widespread sea urchins in that region. Its spines can deliver a mild venom, so it is best to watch where you put your feet.1

Viva en

Indo-Pacific region, from the Red Sea and east Africa to Australia and Japan; also found in the Mediterranean off Turkey after introduction1

Ocean Indic, Ocean Pacific, Mar Cotschen, Mar da Coral, Mar da las Filippinas, Mar Arab e Golf Persic, Mar da Timor e d'Arafura, Golf dal Bengal

Pagina iniziala

Commonly found on coral reefs, but also on sand flats and in seagrass beds. In Hong Kong it is found on rocky reefs, where it can be very numerous. People most often meet it by stepping on it in shallow water.1

Lunghezza

7 cm (2,8 in)1

Paisa

35 g fin 80 g (1,2 oz fin 2,8 oz)1

Sveltezza maximala

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

Nudar, stima approximativa

Tge mangia el?

It is a prolific grazer that feeds on many kinds of algae common on tropical coral reefs.1

Foto da Black long-spined urchin — Black long-spined urchin. Foto: Quartl. CC BY-SA 4.0, iNaturalist.

Co renconuscher el

Black, near-spherical body (test) with extremely long, narrow, hollow spines, often black but sometimes brown-banded1
Five white spots on the body, which separate it from other Diadema species1
A bright orange ring around the periproctal cone (the 'anal cone'), which is often mistaken for an eye1
Bluish spots on the genital plates and a line of blue spots along the body1
Adults are no more than 70 mm across the body and about 40 mm high1

Savens confundì cun: Other Diadema species are similar in shape and spines, but they lack the five white spots that mark this species. Its orange ring and blue spots also help to tell it apart.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 are hollow and contain a mild venom. The toxin mostly causes swelling and pain, which spreads gradually over several hours. The venom is not fatal to humans. The spines themselves are a bigger problem, because they are brittle and needle-like, break off in flesh and are difficult to remove.1

Quant privlus è el per umans?

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

The venom is only mild, and the species is not considered a serious threat to humans. Stepping on it can cause painful stings.1

Tge fa el, cura ch'el ha tema?

When threatened by a sudden impact or by spines snapping, it rapidly flips its body over and 'runs' on the tips of its longest spines.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?

Africa Asia Europa America dal Nord America dal Sid Australia ed Oceania Ocean Pacific Ocean Indic Mar Cotschen Mar da Coral Mar da las Filippinas Mar Arab e Golf Persic Mar da Timor e d'Arafura Golf dal Bengal

Quant grond è el?

Quant lung è el?

Quant grev è el?

uschè grev sco 80 clips da palpiri

uschè lung sco 2 bluccs da construcziun in suenter l'auterpli plaun ch'ina lindorna da curtin

Quant grond è Black long-spined urchin cumpareglià cun TAI?

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

Quant svelt è el?

In chaval da mar circa 0,0015 km/h (0 mph)

Black long-spined urchin circa 0,02 km/h (0,01 mph)

Ina lindorna da curtin circa 0,05 km/h (0,03 mph)

bun da savair

Fatgs

It can move 760 mm in just 7 seconds by rolling and walking on the tips of its spines.1

It has no eye, but it has a diffuse light-sensing system that lets it detect light levels and the size and colour of objects.1

In 2006, living specimens were found off Turkey, making it the first invasive Erythrean sea urchin recorded in the Mediterranean.1

Goose barnacles of the genus Microlepas are known to live on it as parasites.1

It is considered one of the oldest living species in its genus, Diadema.1

Destructur da mits

Mit: Black long-spined urchins are deadly and their stings can kill people.

Vardad: Their venom is mild and is not fatal to humans. The main problems are pain, swelling and spines that break off in the skin.1

Per experts da tissi

Num scientific: Diadema setosum
Gruppa: Ritschs, stailas e verms
Famiglia: Diadematidae2
Urden: Diadematoida
Continents: Ocean Indic, Ocean Pacific, Mar Cotschen, Mar da Coral, Mar da las Filippinas, Mar Arab e Golf Persic, Mar da Timor e d'Arafura, Golf dal Bengal, Ils oceans
Poppins: It is a broadcast spawner, releasing eggs and sperm into the water. Spawning happens seasonally or year-round depending on the location, and in some places it follows the full moon.1
Privel per umans: 2 / 5: Dolurus3

Da nua che vegnan ils fatgs

Diadema setosum (Wikipedia (CC BY-SA 4.0))
Diadema setosum (iNaturalist): nums e classificaziun.
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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