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Spotted ratfish

Hydrolagus colliei

Oor die naam: 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

Maak net seerMoenie aanraak nieDit maak seer, maar dit sal jou nie ernstig skade doen nie.

Giftige visse

Giftige stekelsEet: Vleis

Gevaar vir mense: PynlikDit kan regtig seermaak, maar dit is amper nooit ernstig nie.

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

Leef in

Northeastern Pacific Ocean, from Alaska to Baja California, plus an isolated population in the Gulf of California1

Stille Oseaan, Golf van Kalifornië

Tuis

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

Lengte

14 cm tot 97 cm (5,5 in tot 3,2 ft)1

Topspoed

omtrent 15 km/h (9,3 mph)

Swem, rowwe skatting

Wat eet dit?

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

Foto van Spotted ratfish — Spotted ratfish. Foto: Brian Gratwicke. CC BY 4.0, iNaturalist.

Hoe om dit te herken

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

Gifkrag

Giftige stekels

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

Wat doen sy gif as dit byt of steek?

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

Hoe gevaarlik is dit vir mense?

Gevaar vir mense: PynlikDit kan regtig seermaak, maar dit is amper nooit ernstig nie.

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

Wat doen dit as dit bang is?

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

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 huiskatte neus tot stertso lank soos 5 piesangs punt aan puntkan die lengte van 'n groot swembad (50 m) in 12 sekondes swem

Hoe groot is Spotted ratfish 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)

Spotted ratfish omtrent 15 km/h (9,3 mph)

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

die moeite werd om te weet

Feite

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

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

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

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

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

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

Vir gifkenners

Wetenskaplike naam: Hydrolagus colliei
Groep: Giftige visse
Familie: Chimaeridae2
Orde: Chimaeriformes
Kontinente: Stille Oseaan, Golf van Kalifornië, Die oseane
Babas: 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
Gevaar vir mense: 2 / 5: Pynlik3

Waar die feite vandaan kom

Spotted ratfish (Wikipedia (CC BY-SA 4.0))
Hydrolagus colliei (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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