Estuary croaker (Sonorolux fluminis)

Scientific name: Sonorolux fluminis Trewavas, 1977

The Estuary croaker (Sonorolux fluminis) is a brackish-water fish of the family Sciaenidae. Native range: Western Central Pacific, Sarawak, Borneo.

Biology

Dorsal spines (total): 10 - 11; Dorsal soft rays (total): 28-29; Anal spines: 2; Anal soft rays: 7 - 8. Deep rounded body. Upper rostral pores absent, marginal rostral pore median only. First pair of mental pores small, rounded, at front of chin, separated by symphysis. Gill rakers long, slender, about 1.5 times as long as gill filaments at angle of arch, 16 to 27 on lower limb. Second anal spine slender, 33-37 % of head length. Scales on head and anterior part of body cycloid (smooth). Small scales present on soft parts of dorsal and anal fins; many of ventral scales covering patches of yellow, luminous tissue. Swim bladder carrot-shaped, with about 20 pairs of arborescent appendages along its side, each with a well-developed dorsal and ventral limbs; the first pair entering head beyond transverse septum. Sagitta (large earstone0 with a tadpole-shaped impression, the tail of which nearly straight, only slightly curved, ending in a rounded disc.

Source: FishBase, licensed CC BY-NC 4.0.

Species facts

Scientific name
Sonorolux fluminis
Family
Sciaenidae (Drums or croakers)
Order
Perciformes (Perch-like fish)
Class
Actinopterygii (Ray-finned fishes)
Maximum length
8.0
Environment
Brackish; benthopelagic; non-migratory
Climate
Tropical
Distribution
Western Central Pacific: Sarawak, Borneo.
Conservation status (IUCN)
Not Evaluated
Threat to humans
Harmless
Uses
Fisheries: of no interest
Resilience
High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.)

Sources

Taxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.

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