slender codling
Halargyreus johnsonii
Deep-water fish, with records in Argentina and Chile, of no interest to recreational fishing. Sometimes turns up as a commercial catch.
Also called: abrótea-esguia, slender codling
- maximum
- 56 cm
- depth
- 450–3,000 m
who is the slender codling
Fish of the family Moridae, from deep waters, between 450 and 3,000 m. It reaches 56 cm. It has scattered records in cold and subantarctic waters of the Atlantic and the Pacific. It is epibenthic, meaning it lives on the bottom, and feeds on small free-living animals, such as crustaceans and squid. It turns up as a commercial trawl catch in temperate waters of Australia, and in Latin America there are records in Argentina and Chile.
Essential profile. Identification, where it occurs and rules, with data from FishBase and the cited regulations. Season, time of day, technique and bait are added once we have a good source for the slender codling; in the meantime, see the similar species.
identification
Elongated, compressed body, pale and silvery when fresh. Large eye, with a diameter almost equal to the length of the snout, and a lower jaw slightly protruding, with no chin barbel. The anal fin starts in the middle of the body, and the pectorals do not reach its base. In the same area, the violet cod (Antimora rostrata) is blue-grey and darker.
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Each card shows the day's index (0 to 100) and, below it, a strip with the index for each hour, from 0h to 23h. from poor to excellent.
Essential profile: the index uses a general fish model (weather, sun, moon and tide), without a season or time of day specific to this species.
where found
In Latin America there are records in Argentina and Chile, in deep waters.
Habitat: Slope and ocean floor, between 450 and 3,000 m deep.
rules for the slender codling
Summary of the regulations we found, with the source for each. Rules change; before keeping or transporting fish, check with the state environmental agency.
We found no species-specific rule beyond the region's general rules.
catch and release
catch and release Releasing the fish alive, quickly and with a wet hand. During a closed season it isn't always allowed: what the regulation says applies.
It has no dangerous spines. It lives at very great depths, so the ascent causes barotrauma; if it comes on the line, release it with care.
how much it weighs without taking it out of the water
Length-weight relationship W = a·Lb (a = 0.00389, b = 3.11; FishBase (relação peso-comprimento bayesiana, estimativa)). It's an average: a fat or lean fish can vary by 10% to 20%.
estimated weight
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sources and references
Essential profile: size, length-weight, depth, countries and conservation come from FishBase and the cited regulations, and the texts were written from those sources. Season, time of day, sensitivities, technique and baits and lures are not included yet, because we did not find a good source for this species.
- scientific FishBase: Halargyreus johnsonii (ficha da espécie)Size, length-weight, depth, habitat, distribution, biology, and IUCN status. Page checked on Oct 13, 2026.
- scientific FishBase: nomes populares de Halargyreus johnsoniiNames by country and language.
