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Horn shark

Heterodontus francisci

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

OnskadelikOnskadelik vir mense. Niks om oor bekommerd te wees nie.

Giftige visse

Giftige stekelsEet: Vleis

Gevaar vir mense: LigSoos 'n bysteek of minder. Basies onskadelik vir mense.

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

Leef in

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

Stille Oseaan, Golf van Kalifornië

Tuis

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

Lengte

1,2 m (3,9 ft)1

Topspoed

omtrent 20 km/h (12 mph)

Swem, rowwe skatting

Wat eet dit?

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

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

Hoe om dit te herken

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

Gifkrag

Giftige stekels

Skerp stekels dra die gif. Dit maak seer as jy daarop trap of dit gryp.

Hoe gevaarlik is dit vir mense?

Gevaar vir mense: LigSoos 'n bysteek of minder. Basies onskadelik vir mense.

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

Wat doen dit as dit bang is?

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

As sy stekels jou steek

Sit die wond in warm water, so warm as wat die persoon kan verdra sonder om te brand (toets dit met jou eie hand), vir 30 tot 90 minute. Kry mediese hulp, veral vir klipvisse en pylsterte.

Bel altyd eers jou noodnommer (112, 000, 911). Dit is algemene noodhulpraad, nie mediese advies nie. Noodhulp-basiese beginsels

Bly veilig

Moet nooit aan 'n wilde dier raak, dit vang of terg nie, selfs nie 'n kleintjie nie, en selfs nie as dit lyk of dit slaap of dood is nie.
Gee dit spasie. As jy een raakloop, bly kalm, stap stadig terug en laat dit sy eie pad gaan.
As sy stekels jou steek: bly kalm, bly stil, bel jou noodnommer (112, 000, 911) of kom vinnig by 'n hospitaal uit. Onthou hoe dit gelyk het, 'n foto help.

Dit is nie uit om jou te kry nie. Dit gebruik sy gif om kos te vang of om homself te beskerm, en kruip baie eerder weg. Meer oor veilig bly

Waar in die wêreld?

Afrika Asië Europa Noord-Amerika Suid-Amerika Australië & Oseanië Stille Oseaan Golf van Kalifornië

Hoe groot is dit?

Hoe lank is dit?

so lank soos 2,5 huiskatte neus tot stertso lank soos 7 piesangs punt aan puntkan die lengte van 'n groot swembad (50 m) in 9 sekondes swem

Hoe groot is Horn shark in vergelyking met JOU?

Net wiskunde in jou blaaier. Niks word gestoor of enige plek heen gestuur nie.

Hoe vinnig is dit?

'n Olimpiese swemmer omtrent 8 km/h (5 mph)

Horn shark omtrent 20 km/h (12 mph)

'n Dolfyn op volspoed omtrent 35 km/h (22 mph)

die moeite werd om te weet

Feite

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

Vir gifkenners

Wetenskaplike naam: Heterodontus francisci
Groep: Giftige visse
Familie: Heterodontidae2
Orde: Heterodontiformes
Kontinente: Stille Oseaan, Golf van Kalifornië, Die oseane
Babas: 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
Hoe dit in die natuur gaan: Insufficient data (IUCN); population listed as stable on 10 October 20251
Gevaar vir mense: 1 / 5: Lig3

Waar die feite vandaan kom

Horn shark (Wikipedia (CC BY-SA 4.0))
Heterodontus francisci (iNaturalist): name en klassifikasie.
Venom Wiki: die gevaarvlak, die tipiese grootte en die spoedskatting is ons eie. Kyk hoe ons dit uitwerk: Hoe ons gevaar gradeer.

Elke feit op hierdie bladsy het 'n nommer wat na sy bron wys. As ons iets verkeerd het, jammer, ons is dierfanatici, nie 'n wetenskaplike joernaal nie. Laat weet ons by [email protected] en ons maak dit reg.

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