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Spotted ratfish

Hydrolagus colliei
Davart il num: 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
Fa mo malBetg tutgarQuai fa mal, ma i na ta fa nagin donn serius.
Peschs tissientads Spinas tissientadasMangia: Charn
Privel per umans: DolurusQuai po far propi mal, ma i n'è bunamain mai grav.

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

Viva en
Northeastern Pacific Ocean, from Alaska to Baja California, plus an isolated population in the Gulf of California1
Ocean Pacific, Golf da California
Pagina iniziala
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
Lunghezza
14 cm fin 97 cm (5,5 in fin 3,2 ft)1
Sveltezza maximala
circa 15 km/h (9,3 mph)
Nudar, stima approximativa
Tge mangia el?
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
Propi!Foto da Spotted ratfish
Spotted ratfish. Foto: Brian Gratwicke. CC BY 4.0, iNaturalist.

Co renconuscher el

  • 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

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 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

Quant privlus è el per umans?

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

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

Tge fa el, cura ch'el ha tema?

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

Sche sias spinas ta furan

  • Metta la plaja en aua chauda, uschè chauda sco che la persuna po supportar senza sa brischar (emprova cun tes agen maun), durant 30 fin 90 minutas. Tschertga agid medicinal, surtut tar peschs crap e rajas.

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?

AfricaAsiaEuropaAmerica dal NordAmerica dal SidAustralia ed OceaniaOcean PacificGolf da California

Quant grond è el?

Quant lung è el?

Spotted ratfish circa 97 cm lung (3,2 ft)In giat da chasa circa 50 cm (1,6 ft)In chaun circa 1 m (3,3 ft)
uschè lung sco 2 giats da chasa dal nas fin a la cuauschè lung sco 5 bananas ina suenter l'autrapudess nudar la lunghezza d'in grond bassin (50 m) en 12 secundas

Quant grond è Spotted ratfish cumpareglià cun TAI?

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

Quant svelt è el?

bun da savair

Fatgs

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

Per experts da tissi

Num scientific
Hydrolagus colliei
Gruppa
Peschs tissientads
Famiglia
Chimaeridae2
Urden
Chimaeriformes
Continents
Ocean Pacific, Golf da California, Ils oceans
Poppins
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
Privel per umans
2 / 5: Dolurus3

Da nua che vegnan ils fatgs

  1. Spotted ratfish (Wikipedia (CC BY-SA 4.0))
  2. Hydrolagus colliei (iNaturalist): nums e classificaziun.
  3. 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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Viva era en: Ocean Pacific

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