Actinopteri (ray-finned fishes) > Eupercaria/misc
(Various families in series Eupercaria) > Sciaenidae
(Drums or croakers)
Environment: milieu / climate zone / depth range / distribution range
Marine; demersal. Tropical
Indian Ocean: restricted to the southeast coasts of India and Sri Lanka.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 16.0 cm SL male/unsexed; (Ref. 10102)
(total): 27-30. Scales small. Head scales all cycloid. Total number of scales above and below the lateral line 19-23 (mean= 20).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Sasaki, K., 1994. Johnius mannarensis Mohan (Sciaenidae): a valid species distinct from J. macropterus (Bleeker). Jap. J. Ichthyol. 41(1):65-67. (Ref. 10102)
IUCN Red List Status (Ref. 125652)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00891 (0.00406 - 0.01955), b=3.08 (2.91 - 3.25), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.4 ±0.5 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153
): Low vulnerability (10 of 100).