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Eserese katuun nke Black long-spined urchin
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Black long-spined urchin

Diadema setosum
Naanị na-afụ ụfụEmetụla ya akaỌ na-afụ ụfụ, mana ọ gaghị emerụ gị ahụ nke ukwuu.
Urchin, kpakpando osimiri na ikpuru Mkpu na-agba nsịNri ya: Osisi
Ihe ize ndụ nye mmadụ: Na-afụ ụfụỌ nwere ike ịfụ ụfụ nke ukwuu, mana ọ naghị adịkarị njọ.

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

Ebe obibi
Indo-Pacific region, from the Red Sea and east Africa to Australia and Japan; also found in the Mediterranean off Turkey after introduction1
Oké Osimiri India, Oké Osimiri Pasifik, Osimiri Uhie, Osimiri Coral, Osimiri Filipin, Osimiri Arabia na Ọwara Peshia, Osimiri Timor na Arafura, Ọwara Bengal
Ụlọ
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
Ogologo
7 cm (2.8 in)1
Arọ
35 g ruo 80 g (1.2 oz ruo 2.8 oz)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 prolific grazer that feeds on many kinds of algae common on tropical coral reefs.1
N'ezie!Foto Black long-spined urchin
Black long-spined urchin. Foto: Quartl. CC BY-SA 4.0, iNaturalist.

Otú ị ga-esi mata ya

  • 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

A na-agwakọkarị ya na: 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

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 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

Kedu otú o si dị egwu nye mmadụ?

Ihe ize ndụ nye mmadụ: Na-afụ ụfụỌ nwere ike ịfụ ụfụ nke ukwuu, mana ọ naghị adịkarị njọ.

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

Gịnị ka ọ na-eme mgbe ụjọ tụrụ ya?

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

Ọ bụrụ na mkpu ya dụrụ gị

  • 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?

AfrịkaEshiaYuropUgwu AmerikaNdịda AmerikaỌstrelia na OsheniaOké Osimiri PasifikOké Osimiri IndiaOsimiri UhieOsimiri CoralOsimiri FilipinOsimiri Arabia na Ọwara PeshiaOsimiri Timor na ArafuraỌwara Bengal

Ọ hà aṅaa?

Kedu otú o si dị ogologo?

Black long-spined urchin ogologo ya dị ihe dị ka 7 cm (2.8 in)Pepa klip ihe dị ka 3 cm (1.2 in)Ekwentị smartphone ihe dị ka 15 cm (5.9 in)

Kedu otú o si dị arọ?

dị arọ dị ka pepa klip 80
dị ogologo dị ka blọk egwuregwu 2 n'ahịrịnwayọ karịa ejula ubi

Kedu otú Black long-spined urchin 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?

ọ dị mma ịmara

Eziokwu

1

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

2

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

3

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

4

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

5

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

Onye na-ekpughe akụkọ ụgha

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

Eziokwu: 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

Maka ndị ọkachamara nsị

Aha sayensị
Diadema setosum
Otu
Urchin, kpakpando osimiri na ikpuru
Ezinụlọ
Diadematidae2
Usoro
Diadematoida
Kọntinent dị iche iche
Oké Osimiri India, Oké Osimiri Pasifik, Osimiri Uhie, Osimiri Coral, Osimiri Filipin, Osimiri Arabia na Ọwara Peshia, Osimiri Timor na Arafura, Ọwara Bengal, Oké osimiri niile
Ụmụ ọhụrụ
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
Ihe ize ndụ nye mmadụ
2 / 5: Na-afụ ụfụ3

Ebe eziokwu ndị a si

  1. Diadema setosum (Wikipedia (CC BY-SA 4.0))
  2. Diadema setosum (iNaturalist): aha na nhazi ọkwa.
  3. 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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