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Horn shark

Heterodontus francisci

Kuhusu jina: The scientific name francisci refers to San Francisco, although the shark's range does not reach that far north.1

Hana madharaHana madhara kwa watu. Hakuna cha kuhofia.

Samaki wenye sumu

Miiba yenye sumuHula: Nyama

Hatari kwa watu: HafifuKama kudungwa na nyuki au chini ya hapo. Kimsingi hana madhara kwa watu.

The horn shark is a small shark with a blunt head and two tall fins, each with a large spine at the front. It lives along the western coast of North America, from California to the Gulf of California. It spends its days hidden in caves and crevices and hunts at night.1

Anaishi

Eastern Pacific coast of North America, from Monterey Bay in California south to the Gulf of California1

Bahari ya Pasifiki, Ghuba ya California

Nyumbani

Adults live in shallower water, usually 2 to 11 m deep, on rocky reefs and in algae beds. Juveniles prefer sandy flats in deeper water, 40 to 150 m deep. In winter, adults move to water deeper than 30 m.1

Urefu

1.2 m (3.9 ft)1

Kasi ya juu

takriban km 20 kwa saa (maili 12 kwa saa)

Kuogelea, makadirio

Hula nini?

Adults eat mostly hard-shelled molluscs, sea urchins and crustaceans, which they crush with their flat back teeth. They suck prey out of the sand and rocks, and can lever loose prey free with their body.1

Picha ya Horn shark — Horn shark. Picha: Chad King / SIMoN NOAA, no known copyright restrictions (public domain). Public domain, iNaturalist.

Jinsi ya kumtambua

Short, blunt head with low ridges over the eyes1
Two high dorsal fins, each with large, stout spines at the front1
Brown or grey body with many small dark spots, though older sharks may have no spots1
Yellowish underside1
Usually about 1 m long, and most do not exceed this length1

Nguvu ya sumu

Miiba yenye sumu

Miiba mikali hubeba sumu. Kumkanyaga au kumshika kunauma.

Ana hatari gani kwa watu?

Hatari kwa watu: HafifuKama kudungwa na nyuki au chini ya hapo. Kimsingi hana madhara kwa watu.

Horn sharks are harmless unless they are harassed. They are not targeted by commercial or recreational fisheries, though small numbers are caught by accident.1

Hufanya nini akiogopa?

During the day they stay still in hiding places, but they swim away quickly if disturbed.1

Miiba yake ikikuchoma

Weka jeraha kwenye maji ya moto, moto kiasi ambacho mtu anaweza kuvumilia bila kuungua (pima kwanza kwa mkono wako), kwa dakika 30 hadi 90. Tafuta msaada wa kitabibu, hasa kwa samaki-jiwe na taa.

Daima piga namba ya dharura kwanza (112, 000, 911). Huu ni mwongozo wa jumla wa huduma ya kwanza, si ushauri wa kitabibu. Misingi ya huduma ya kwanza

Kaa salama

Kamwe usimguse, kumkamata wala kumchokoza mnyama wa porini, hata akiwa mdogo, na hata akionekana amelala au amekufa.
Mpe nafasi. Ukikutana naye, tulia, rudi nyuma polepole na umwache aende zake.
Miiba yake ikikuchoma: tulia, usitikisike, piga namba yako ya dharura (112, 000, 911) au nenda hospitali haraka. Kumbuka alivyoonekana, picha husaidia.

Hakuwindi wewe. Hutumia sumu yake kukamata chakula au kujilinda, na hupendelea zaidi kujificha. Zaidi kuhusu kukaa salama

Wapi duniani?

Afrika Asia Ulaya Amerika Kaskazini Amerika Kusini Australia na Oceania Bahari ya Pasifiki Ghuba ya California

Ana ukubwa gani?

Ana urefu gani?

urefu sawa na paka wa nyumbani 2.5 kutoka pua hadi mkiaurefu sawa na ndizi 7 zilizopangwa mstariangeweza kuogelea urefu wa bwawa kubwa (m 50) kwa sekunde 9

Horn shark ana ukubwa gani ukilinganisha na WEWE?

Ni hesabu tu kwenye kivinjari chako. Hakuna kinachohifadhiwa wala kutumwa popote.

Ana kasi gani?

Mwogeleaji wa Olimpiki takriban km 8 kwa saa (5 mph)

Horn shark takriban km 20 kwa saa (12 mph)

Pomboo kwa kasi kamili takriban km 35 kwa saa (22 mph)

inafaa kujua

Ukweli

For its size, the horn shark has the strongest bite of any shark that has been measured.1

To pull prey loose, the shark pushes its head up with a downward stroke of its tail. No other shark has been seen doing this.1

Large horn sharks that eat many sea urchins can have purple-stained teeth and fin spines.1

A Pacific angelshark was filmed trying to swallow a juvenile horn shark, but spat it out because of the spines.1

Horn sharks have only 148 electroreceptors (ampullae of Lorenzini), far fewer than most sharks, which may have over 2,000. They rely mainly on smell to find food.1

A dropped tooth takes about 4 weeks to be replaced.1

Kwa wataalamu wa sumu

Jina la kisayansi: Heterodontus francisci
Kundi: Samaki wenye sumu
Familia: Heterodontidae2
Mpangilio: Heterodontiformes
Mabara: Bahari ya Pasifiki, Ghuba ya California, Bahari kuu
Watoto: They lay eggs. From February to April, females lay up to 24 eggs, two at a time, every 11 to 14 days, and wedge the egg cases into crevices to protect them.1
Hali yake porini: Insufficient data (IUCN); population listed as stable on 10 October 20251
Hatari kwa watu: 1 / 5: Hafifu3

Ukweli unatoka wapi

Horn shark (Wikipedia (CC BY-SA 4.0))
Heterodontus francisci (iNaturalist): majina na uainishaji.
Venom Wiki: kiwango cha hatari, ukubwa wa kawaida na makadirio ya kasi ni yetu wenyewe. Ona jinsi tunavyovipata: Jinsi tunavyopima hatari.

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