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Greater weever

Trachinus draco

Oor die naam: The word "weever" is thought to come from the Anglo-Saxon word "wivre", meaning "viper".1

Moet 'n dokter sienMoenie aanraak nieSelde dodelik, maar as sy stekels jou steek, gaan dokter toe.

Giftige visse

Giftige stekelsEet: Vleis

Gevaar vir mense: ErnstigAs sy stekels jou steek, gaan dokter toe. Sterftes is baie skaars.

The greater weever is a small sea fish that buries itself in shallow sand along the eastern Atlantic coast and in the Mediterranean and Black Seas. Its spines carry a venom that causes intense pain, so it is one of the most dangerous fishes in the Mediterranean for swimmers.1

Leef in

Eastern Atlantic from Norway to Morocco, plus the Mediterranean, Aegean and Black Seas1

Atlantiese Oseaan, Middellandse See, Noordsee

Tuis

It lives in water from shallow depths down to 150 m, mostly over muddy or sandy sea floors. In shallow water it hides in fine sand, where bathers may step on it or fall onto it, especially in summer.1

Lengte

9,5 cm tot 40 cm (3,7 in tot 1,3 ft)1

Gewig

5,3 g tot 1,7 kg (0,2 oz tot 3,8 lb)1

Topspoed

omtrent 6 km/h (3,7 mph)

Swem, rowwe skatting

Wat eet dit?

It is an ambush predator that waits buried in sand during the day, with only its eyes and the tip of its dorsal fin showing. It attacks prey that come close in a swift, sudden movement, mainly small fish, decapods and mysids.1

Foto van Greater weever — Greater weever. Foto: Tomasz Sienicki [user: tsca, mail: tomasz.sienicki at gmail.com]. CC BY 1.0, Wikimedia Commons.

Hoe om dit te herken

Elongated, flattened body with a mouth that points upwards and a lower jaw longer than the upper jaw1
Large, flat head with the eyes sitting almost on top of it1
Greenish brown colour with several dark marks on the upper side of the head1
Yellowish brown flanks with bright blue and yellow broken stripes, plus oblique black stripes along the sides that look tiger-like1
Venomous spines on the first dorsal fin and on each gill cover1

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 venom contains a large protein called Dracotoxin, which can be lethal in high enough doses. It damages cell membranes, and the sting is followed by a short period of tissue changes around the wound. The best-known effect is excruciating pain that begins shortly after the sting and can last from a few hours to days.1

Hoe gevaarlik is dit vir mense?

Gevaar vir mense: ErnstigAs sy stekels jou steek, gaan dokter toe. Sterftes is baie skaars.

The most common incident happens when a bather steps, jumps or falls onto a buried greater weever in shallow water, especially in summer. Fishermen handling fish caught in nets are also at risk. The pain can reach 10 out of 10 on the numeric rating scale, and some stings have caused pain for months, though this is rare. Reported fatal accidents exist, but these are widely believed to be due to secondary infections and sepsis rather than the toxin itself.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 Atlantiese Oseaan Middellandse See Noordsee

Hoe groot is dit?

Hoe lank is dit?

Hoe swaar is dit?

so swaar soos 14 piesangs

so lank soos 12 speelgoed-boublokke in 'n rykan die lengte van 'n groot swembad (50 m) in 30 sekondes swem

Hoe groot is Greater weever in vergelyking met JOU?

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

Hoe vinnig is dit?

'n Mens wat swem omtrent 3 km/h (1,9 mph)

Greater weever omtrent 6 km/h (3,7 mph)

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

die moeite werd om te weet

Feite

Its venom glands sit in the skin, and the sting works through a groove along each spine that carries the venom into the wound.1

It is classed as one of the most venomous fishes in the Mediterranean.1

The record weight is 1.74 kg, for a specimen caught off La Gomera in the Canary Islands in 2005.1

Its diet changes with size: small mysids are the most common prey for fish under 20 cm, while cephalopods and fish make up a bigger share of the diet in larger fish.1

Mite-breker

Mite: A weever sting is often thought to be fatal because of the venom itself.

Waarheid: Reported fatal accidents are widely believed to be caused by secondary infections and sepsis rather than the toxin itself.1

Vir gifkenners

Wetenskaplike naam: Trachinus draco
Groep: Giftige visse
Familie: Trachinidae2
Orde: Perciformes
Kontinente: Atlantiese Oseaan, Middellandse See, Noordsee, Die oseane
Babas: It is egg-laying and releases its eggs into open water, where each egg is 4.8–6.8 mm across and hatches after about three months. It is not known to provide any parental care.1
Gevaar vir mense: 3 / 5: Ernstig3

Waar die feite vandaan kom

Greater weever (Wikipedia (CC BY-SA 4.0))
Trachinus draco (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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