''Genypterus capensis'', commonly known as kingklip, is a species of

cusk eel The cusk-eel family, Ophidiidae, is a group of marine bony fishes in the Ophidiiformes order. The scientific name is from the Greek ''ophis'' meaning "snake", and refers to their eel-like appearance. True eels, however, diverged from other ra ...

occurring along the

Southern African Southern Africa is the southernmost subregion of the African continent, south of the Congo and Tanzania. The physical location is the large part of Africa to the south of the extensive Congo River basin. Southern Africa is home to a number of ...

coast from

Walvis Bay Walvis Bay ( en, lit. Whale Bay; af, Walvisbaai; ger, Walfischbucht or Walfischbai) is a city in Namibia and the name of the bay on which it lies. It is the second largest city in Namibia and the largest coastal city in the country. The c ...

Namibia Namibia (, ), officially the Republic of Namibia, is a country in Southern Africa. Its western border is the Atlantic Ocean. It shares land borders with Zambia and Angola to the north, Botswana to the east and South Africa to the south and ea ...

Algoa Bay Algoa Bay is a maritime bay in the Eastern Cape, South Africa. It is located in the east coast, east of the Cape of Good Hope. Algoa Bay is bounded in the west by Cape Recife and in the east by Cape Padrone. The bay is up to deep. The harbour c ...

South Africa South Africa, officially the Republic of South Africa (RSA), is the southernmost country in Africa. It is bounded to the south by of coastline that stretch along the South Atlantic and Indian Oceans; to the north by the neighbouring countri ...

. It is closely related to '' Genypterus blacodes'' from

New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 smaller islands. It is the sixth-largest island count ...

. The species grows to a maximum length of 180 cm, a weight of 15.0 kg. It is one of the most popular fish items on South African menus. Despite appearances, it is not closely related to the eels of the order

Anguilliformes Eels are ray-finned fish belonging to the order Anguilliformes (), which consists of eight suborders, 19 families, 111 genera, and about 800 species. Eels undergo considerable development from the early larval stage to the eventual adult stage ...

. Kingklip occur at depths from 50–500 m, but usually in the range 250–350 m. They are bottom-dwelling and inhabit rocky localities on the shelf and upper

continental slope A continental margin is the outer edge of continental crust abutting oceanic crust under coastal waters. It is one of the three major zones of the ocean floor, the other two being deep-ocean basins and mid-ocean ridges. The continental margin ...

. Juveniles are more often found in shallow waters. They feed on

dragonets Dragonets are small, percomorph, marine fish of the diverse family Callionymidae (from the Greek ''kallis'', "beautiful" and ', "name") found mainly in the tropical waters of the western Indo-Pacific. They are benthic organisms, spending most ...

mantis shrimps Mantis shrimp, or stomatopods, are carnivorous marine crustaceans of the order Stomatopoda (). Stomatopods branched off from other members of the class Malacostraca around 340 million years ago. Mantis shrimp typically grow to around in length, ...

hake The term hake refers to fish in the: * Family Merlucciidae of northern and southern oceans * Family Phycidae (sometimes considered the subfamily Phycinae in the family Gadidae) of the northern oceans Hake Hake is in the same taxonomic order (Gad ...

squid True squid are molluscs with an elongated soft body, large eyes, eight arms, and two tentacles in the superorder Decapodiformes, though many other molluscs within the broader Neocoleoidea are also called squid despite not strictly fitting t ...

, and various fish species. Spawning usually takes place from August to October. The species is

oviparous Oviparous animals are animals that lay their eggs, with little or no other embryonic development within the mother. This is the reproductive method of most fish, amphibians, most reptiles, and all pterosaurs, dinosaurs (including birds), and ...

, with oval pelagic eggs floating in a gelatinous mass. Their dorsal soft rays number 150, while the anal soft rays number 110. The head and body are normally pink to orange in colour, with dark blotches dorsally. Andrew Smith, the redoubtable Scots explorer and zoologist, first described the kingklip in 1847 from a specimen caught near the entrance to

Table Bay Table Bay (Afrikaans: ''Tafelbaai'') is a natural bay on the Atlantic Ocean overlooked by Cape Town (founded 1652 by Van Riebeeck) and is at the northern end of the Cape Peninsula, which stretches south to the Cape of Good Hope. It was named ...

and named it ''Xiphiurus capensis'' ('xiphos'=sword, 'oura'=tail). His description was published in "Illustrations of the zoology of South Africa", an account of the natural history objects he collected during his expedition into the interior of South Africa in 1834-36. It was also described by the German naturalist

Johann Jakob Kaup Johann Jakob von Kaup (10 April 1803 – 4 July 1873) was a German naturalist. A proponent of natural philosophy, he believed in an innate mathematical order in nature and he attempted biological classifications based on the Quinarian system. Kaup ...

in 1858 and named ''Hoplophycis lalandi''. Kingklip were heavily exploited in the 1980s, and populations have not yet recovered so that some precautions are in place. Being relatively slow-growing and long-lived, stocks cannot sustain the pressure of targeted fishing, and are taken only as a bycatch species. It is one of the economically important species to South African fisheries. The related species from New Zealand, '' Genypterus blacodes'', has made its way to South African markets and is retailed as kingklip. Kingklip's lack of obvious scales has sparked lively and ongoing debate in Jewish circles as to whether it qualifies as

kosher (also or , ) is a set of dietary laws dealing with the foods that Jewish people are permitted to eat and how those foods must be prepared according to Jewish law. Food that may be consumed is deemed kosher ( in English, yi, כּשר), fro ...

treif (also or , ) is a set of dietary laws dealing with the foods that Jewish people are permitted to eat and how those foods must be prepared according to Jewish law. Food that may be consumed is deemed kosher ( in English, yi, כּשר), from ...

. A 12-month study on larval development in the southern Benguela Current suggested that there are different spawning strategies for the western

Agulhas Bank The Agulhas Bank (, from Portuguese for Cape Agulhas, ''Cabo das Agulhas'', "Cape of Needles") is a broad, shallow part of the southern African continental shelf which extends up to south of Cape Agulhas before falling steeply to the abyssal pl ...

and the

West Coast West Coast or west coast may refer to: Geography Australia * Western Australia *Regions of South Australia#Weather forecasting, West Coast of South Australia * West Coast, Tasmania **West Coast Range, mountain range in the region Canada * Britis ...

. On the Agulhas Bank, spawning is initiated by a decrease in sea surface temperature, whereas on the West Coast, spawning only occurs when upwelling has decreased, i.e., between June and December. Females grow larger than males in both areas, but are slower growing.

References

*Nielsen, J.G., D.M. Cohen, D.F. Markle and C.R. Robins. 1999. {{Taxonbar, from=Q646058 Ophidiidae Fish of the Atlantic Ocean Fish of the Indian Ocean Marine fish of South Africa Fish described in 1847 Taxa named by Andrew Smith (zoologist)