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Scombriformes (Mackerels) >
Gempylidae (Snake mackerels)
Etymology: Rexea: Latin, rex, rego = king.
Eponymy: Dr Izumi Nakamura (1939–2021) was a Japanese ichthyologist at the Kyoto University Aquatic Natural History Museum’s Maizuru Fisheries Research Station and an expert on billfishes. [...] (Ref. 128868), visit book page.
Environment: milieu / Klimaatzone / Diepte / distribution range
Ecologie
marien benthopelagisch; diepte 340 - 370 m (Ref. 6181). Deep-water; 34°N - 18°S, 53°E - 154°W (Ref. 6181)
Indo-West Pacific: Nazareth Bank and off Sumatra in the Indian Ocean and Kyushu-Palau Ridge, Japan and off Oahu, Hawaii.
Grootte / Gewicht / Leeftijd
Maturiteit: Lm ? range ? - ? cm
Max length : 38.0 cm SL mannelijk / geslacht onbekend; (Ref. 6181)
Dorsale stekels (totaal) : 19 - 20; Dorsale zachte stralen (totaal) : 15 - 18; Anale stekels: 2; Anale zachte stralen: 12 - 13; Wervels: 34. Pectoral fin is represented by a single spine in small specimens or entirely absent in individuals over 25 cm SL. Lateral line branching below the 5th to 6th spine of the first dorsal fin. The upper line reaches to the base of the first dorsal finlet, the lower line runs sub laterally. Most of the body is naked except for a large rectangular stripe of squamation extending forward from the caudal peduncle. Overall color is grayish brown; a black blotch is on membranes between the first and third dorsal-fin spine.
Body shape (shape guide): elongated; Cross section: compressed.
Mesobenthopelagic (Ref. 58302). Matures at about 25 cm standard length (Ref. 6181).
Levenscyclus en paargedrag
Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven
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)
Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-1)
Gevaar voor de mens
Harmless
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Estimates based on models
Preferred temperature (Ref.
123201): 3.9 - 7.2, mean 6 °C (based on 147 cells).
Fylogenetische diversiteitsindex (Ref.
82804): PD
50 = 0.5078 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00372 (0.00167 - 0.00826), b=3.10 (2.91 - 3.29), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisch niveau (Ref.
69278): 4.2 ±0.7 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (36 of 100).
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![Image of Rexea nakamurai (Nakamura\](/images/thumbnails/gif/tn_Renak_u0.gif "Image of Rexea nakamurai (Nakamura\")
