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Rexea prometheoides  (Bleeker, 1856)

Royal escolar
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Native range | All suitable habitat | Point map | Year 2100
This map was computer-generated and has not yet been reviewed.
Rexea prometheoides   AquaMaps   Data sources: GBIF OBIS
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Image of Rexea prometheoides (Royal escolar)
Rexea prometheoides
Picture by CSIRO

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Perciformes (Perch-likes) > Gempylidae (Snake mackerels)
Etymology: Rexea: Latin, rex, rego = king.

Environment / Climate / Range Ecology

Marine; benthopelagic; depth range 135 - 540 m (Ref. 9784).   Tropical; 36°N - 31°S, 34°E - 157°E (Ref. 6181)

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

Indo-West Pacific: off Mozambique, Kenya, Reunion, Saya de Malha Bank, north Australia, Indonesia, Viet Nam, Philippines, Ryukyu Islands, and southern Japan. Reported from Fiji and Tuvalu (Ref. 12596).

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 40.0 cm SL male/unsexed; (Ref. 6181)

Short description Morphology | Morphometrics

Dorsal spines (total): 19 - 20; Dorsal soft rays (total): 14-17; Anal spines: 2; Anal soft rays: 12 - 15; Vertebrae: 34. Lateral line branching below the 4th to the 5th spine of the first dorsal fin; the upper branch reaching the middle to end of the second dorsal-fin base; the lower branch running mid laterally. Body naked except for a large scaly patch extending around the posterior portion of the lower lateral line. The pelvic fin is represented by a single spine in smaller specimens but is entirely absent in specimens over 18 - 20 cm SL. Body color is grayish with silvery tint; the fins hyaline except for the black blotch on the fin membranes between the first and the third first dorsal spines.

Biology     Glossary (e.g. epibenthic)

Feeds on fishes, crustaceans, and cephalopods (Ref. 5213, 9784). Utilized as a food fish food (Ref. 4537).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

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. 115185)

CITES (Ref. 94142)

Not Evaluated

Threat to humans

  Harmless




Human uses

Fisheries: commercial
FAO(Publication : search) | FisheriesWiki | Sea Around Us

More information

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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | ECOTOX | Faunafri | Fishes of Iran | Fishtrace | GenBank(genome, nucleotide) | GloBI | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | National databases | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Scirus | SeaLifeBase | Tree of Life | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.5078   [Uniqueness, from 0.5 = low to 2.0 = high].
Trophic Level (Ref. 69278):  4.2   ±0.59 se; Based on food items.
Resilience (Ref. 69278):  Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153):  Moderate vulnerability (38 of 100) .
Price category (Ref. 80766):   Unknown.