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Rexea solandri (Cuvier, 1832)

Silver gemfish
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Native range | All suitable habitat | Point map | Year 2050
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Rexea solandri   AquaMaps   Data sources: GBIF OBIS
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Image of Rexea solandri (Silver gemfish)
Rexea solandri
Picture by SeaFIC

Common names from other countries

Escolier tifiati, Escolar plateado, Рексия южная (=южная змеевидная макрель), ... more

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Scombriformes (Mackerels) > Gempylidae (Snake mackerels)
Etymology: Rexea: Latin, rex, rego = king.
  More on author: Cuvier.

Environment: milieu / climate zone / depth range / distribution range Ecology

Marine; benthopelagic; oceanodromous (Ref. 51243); depth range 100 - 800 m (Ref. 6181), usually 300 - 450 m (Ref. 28786).   Deep-water; 25°S - 48°S, 109°E - 173°W (Ref. 6181)

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Southwest Pacific: off southern, southwestern and southeastern Australia, Tasmania and New Zealand. Occurrence records from Madagascar and Japan need to be verified.

Length at first maturity / Size / Weight / Age

Maturity: Lm 65.0, range 60 - 70 cm
Max length : 110 cm SL male/unsexed; (Ref. 6181); max. published weight: 16.0 kg (Ref. 28838); max. reported age: 16 years (Ref. 28786)

Short description Identification keys | Morphology | Morphometrics

Dorsal spines (total): 18 - 19; Dorsal soft rays (total): 16 - 19; Anal spines: 2; Anal soft rays: 13 - 16; Vertebrae: 36. Body entirely scaled at over 25 cm SL. Lateral line branching below the 5th to the 6th spine of the first dorsal fin. The upper branch reaches beyond the origin of the second dorsal fin, usually ending between the 8th to the 12th soft ray. The lower branch runs mid laterally, undulating above the anal-fin base. Body is bluish above, silvery below, a black blotch distally on two anterior membranes of the first dorsal fin, the rest of the fin is grayish.

Biology     Glossary (e.g. epibenthic)

Found in schools on continental shelf and slope. They are normally caught close to the sea bed but probably move into midwater at times (Ref. 28786). Juveniles are pelagic, adults also occur near the surface off Tasmania and New Zealand. Dense schools of pre-spawners migrate along the continental slope at about 400 m during winter (Ref. 9563). Feed on fish, squid and crustaceans. The flesh is of good edible quality and especially tasty when smoked. In Australia, the eastern gemfish stock has been subjected to a prolonged period of poor recruitment which started in 1989 (Ref. 28843, 28786). This event resulted in a very significant decline in the gemfish resource. In Australia, efforts are now being channeled towards the recovery of the fishery.

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae

Larvae are caught in inshore waters which may indicate that gemfish move onto the shelf to spawn, or currents carry larvae in from offshore spawning grounds (Ref. 28786).

Main reference Upload your references | References | Coordinator : Parin, Nikolay V. | Collaborators

Nakamura, I. and N.V. Parin, 1993. FAO Species Catalogue. Vol. 15. Snake mackerels and cutlassfishes of the world (families Gempylidae and Trichiuridae). An annotated and illustrated catalogue of the snake mackerels, snoeks, escolars, gemfishes, sackfishes, domine, oilfish, cutlassfishes,. scabbardfishes, hairtails, and frostfishes known to date. FAO Fish. Synop. 125(15):136 p. (Ref. 6181)

IUCN Red List Status (Ref. 130435)

  Not Evaluated 

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial
FAO(Fisheries: production; publication : search) | FIRMS (Stock assessments) | FishSource | Sea Around Us

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Estimates based on models

Preferred temperature (Ref. 115969): 8.4 - 13.6, mean 10.4 (based on 52 cells).
Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5078   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00347 (0.00193 - 0.00623), b=3.14 (2.98 - 3.30), in cm Total Length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trophic level (Ref. 69278):  4.3   ±0.66 se; based on food items.
Resilience (Ref. 120179):  Medium, minimum population doubling time 1.4 - 4.4 years (K=0.15-0.21; tm=3-6; tmax=16; Fec=500,000).
Prior r = 0.43, 95% CL = 0.28 - 0.64, Based on 2 full stock assessments.
Fishing Vulnerability (Ref. 59153):  High vulnerability (58 of 100).
Climate Vulnerability (Ref. 125649):  High to very high vulnerability (65 of 100).
Price category (Ref. 80766):   Very high.