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Marrazkia: Spotted ratfish
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Spotted ratfish

Hydrolagus colliei
Izenari buruz: The genus name Hydrolagus comes from Greek words meaning water and hare. The species name honours Alexander Collie, a ship's surgeon and early naturalist.1
Min ematen du, besterik ezEz ukituMin ematen du, baina ez dizu kalte larririk egingo.
Arrain pozoitsuak Arantza pozoitsuakJaten du: Haragia
Arriskua pertsonentzat: MingarriaBenetan min handia eman dezake, baina ia inoiz ez da larria.

The spotted ratfish is a chimaera, a cartilage fish related to sharks and rays. It lives in the northeastern Pacific Ocean, and divers often see it at night in the Pacific Northwest. It gets its name from its pointed, rat-like tail.1

Non bizi den
Northeastern Pacific Ocean, from Alaska to Baja California, plus an isolated population in the Gulf of California1
Ozeano Barea, Kaliforniako golkoa
Hasiera
It lives near the sea floor in sandy, muddy or rocky reef areas. Most live in deep water, but in the north they live closer to shore, and off California they can be found as shallow as 30 m. Divers meet it most often at night, and its leathery egg cases are laid on muddy or sandy bottoms, where divers sometimes mistake them for inanimate objects.1
Luzera
14 cm eta 97 cm artean (5,5 in eta 3,2 ft artean)1
Abiadura handiena
15 km/h inguru (9,3 mph)
Igeriketa, kalkulu gutxi gorabeherakoa
Zer jaten du?
It swims slowly above the sea floor and finds food by smell, usually hunting at night when it moves into shallow water. It is especially drawn to crunchy prey such as crabs and clams, and also eats shrimp, worms, small fish, small crustaceans and sea stars.1
Benetan!Argazkia: Spotted ratfish
Spotted ratfish. Argazkia: Brian Gratwicke. CC BY 4.0, iNaturalist.

Nola ezagutu

  • Smooth, scaleless skin that is silvery-bronze, often with gold, blue and green shine1
  • Speckled white spots along the back1
  • Large, triangular pectoral fins that stick straight out from the sides, like airplane wings1
  • A pointed, rat-like tail that makes up almost half of its total length1
  • Large emerald green eyes and a duckbill-shaped snout1

Pozoi-ahalmena

Arantza pozoitsuak

Arantza zorrotzek daramate pozoia. Zapaltzeak edo heltzeak min ematen du.

Zer egiten du bere pozoiak?

The spine on the leading edge of its dorsal fin is grooved and connected to a venom gland at its base. The venom is mildly toxic. A sting from the spine causes a painful wound.1

Zein arriskutsua da pertsonentzat?

Arriskua pertsonentzat: MingarriaBenetan min handia eman dezake, baina ia inoiz ez da larria.

It does not present a serious danger to humans, but its spines can cause painful wounds. Harbor seals have been known to die after swallowing spotted ratfish, when a spine pierced the stomach or esophagus.1

Zer egiten du beldurtzen denean?

It usually keeps a safe distance from divers and is not aggressive, but it will defend its territory with the spine on its dorsal fin if it feels invaded.1

Bere arantzek zulatzen bazaituzte

  • Sartu zauria ur beroan, pertsonak erre gabe jasan dezakeen bezain beroan (probatu zure eskuarekin), 30 eta 90 minutu artean. Lortu mediku-laguntza, batez ere harri-arrain eta bastangen kasuan.

Deitu beti lehenik zure larrialdi-zenbakira (112, 000, 911). Lehen sorospenei buruzko orientabide orokorra da hau, ez mediku-aholkua. Lehen sorospenen oinarriak

Egon seguru

  • Ez ukitu, ez harrapatu eta ez zirikatu inoiz animalia basati bat, txikia izan arren, eta lo edo hilda dagoela badirudi ere.
  • Utzi tartea. Bat aurkitzen baduzu, egon lasai, egin atzera poliki eta utzi bere bidetik joaten.
  • Bere arantzek zulatzen bazaituzte: egon lasai, egon geldi, deitu zure larrialdi-zenbakira (112, 000, 911) edo joan ospitalera azkar. Gogoratu nolakoa zen, argazki batek laguntzen du.

Ez dabil zure atzetik. Pozoia janaria harrapatzeko edo bere burua babesteko erabiltzen du, eta askoz nahiago du ezkutatu. Seguru egoteari buruz gehiago

Zein handia da?

Zein luzea da?

Spotted ratfish 97 cm inguru luze (3,2 ft)Etxeko katu bat 50 cm inguru (1,6 ft)Txakur bat 1 m inguru (3,3 ft)
2 etxeko katu muturretik buztanera jarrita bezain luzea5 banana bata bestearen atzetik jarrita bezain luzeaigerileku handi baten luzera (50 m) igerian egin lezake 12 segundotan

Zein handia da Spotted ratfish ZUREKIN alderatuta?

Matematika hutsa zure nabigatzailean. Ez da ezer gordetzen, ezta inora bidaltzen ere.

Zein azkarra da?

jakin beharrekoa

Datuak

1

Adult males have a club-like cephalic clasper on the head, an organ not found in any other vertebrate, which they use to hold on to females during courtship.1

2

Its large eyes reflect light, much like the eyes of a cat.1

3

It swims with its large pectoral fins, and its barrel rolls and corkscrew turns have been described as aquatic flight.1

4

Its teeth are plate-shaped, mineralised and permanent, unlike the easily replaced teeth of sharks, and they help it grind prey.1

5

Its ampullary organs on the head detect electric fields, and they are homologous to the ampullae of Lorenzini found in sharks and rays.1

6

Its meat is not typically eaten by humans and it is not commercially caught.1

Pozoi-adituentzat

Izen zientifikoa
Hydrolagus colliei
Taldea
Arrain pozoitsuak
Familia
Chimaeridae2
Ordena
Chimaeriformes
Kontinenteak
Ozeano Barea, Kaliforniako golkoa, Ozeanoak
Kumeak
Like some sharks, it lays eggs; the female releases up to two fertilised eggs every 10–14 days in spring to autumn, and development can take up to a year.1
Arriskua pertsonentzat
2 / 5: Mingarria3

Datuak nondik datozen

  1. Spotted ratfish (Wikipedia (CC BY-SA 4.0))
  2. Hydrolagus colliei (iNaturalist): izenak eta sailkapena.
  3. Venom Wiki: arrisku-maila, ohiko tamaina eta abiadura-kalkulua geureak dira. Ikusi nola kalkulatzen ditugun: Nola baloratzen dugun arriskua.

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Talde bereko gehiago: Arrain pozoitsuak

Hemen ere bizi da: Ozeano Barea

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