Actinopteri (ray-finned fishes) > Scombriformes
(Mackerels) > Bramidae
Etymology: Eumegistus: Greek, eu = good + Greek , megistos, -e, -on = very big, powerfull (Ref. 45335). More on authors: Jordan & Jordan.
Environment: milieu / climate zone / depth range / distribution range
Marine; bathypelagic; depth range 1 - 520 m (Ref. 58302), usually - m (Ref. ). Deep-water; 0°C -
Pacific Ocean: Okinawa (Ryukyu Islands), Fiji and Tuvalu (Ref. 12596), Hawaii. Indian Ocean: western part of equatorial zone.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 47.0 cm SL male/unsexed; (Ref. 559)
soft rays: 24;
Vertebrae: 17 - 23. Body color dark-brown to black. Scales on body and head spineless. Scaleless areas above and behind the eye. Caudal fin rounded in young and juveniles, forked in adults. Attains 47 cm SL.
Benthopelagic (Ref. 58302).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Masuda, H., K. Amaoka, C. Araga, T. Uyeno and T. Yoshino, 1984. The fishes of the Japanese Archipelago. Vol. 1. Tokai University Press, Tokyo, Japan. 437 p. (text). (Ref. 559)
IUCN Red List Status (Ref. 124695)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Preferred temperature (Ref. 115969
): 13.9 - 26.9, mean 20.9 °C (based on 400 cells).
Phylogenetic diversity index (Ref. 82805
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01413 (0.00737 - 0.02705), b=2.95 (2.77 - 3.13), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245
Trophic level (Ref. 69278
): 4.2 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): High vulnerability (58 of 100) .