Classificazione / Nomi
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Atheriniformes (Silversides) >
Melanotaeniidae (Rainbowfishes, blue eyes)
Etymology: Melanotaenia: Greek, melan, -anos = black + latin, taenia = stripe (Ref. 45335); sahulensis: Named for the Pleistocene-era continent Sahul which comprised the land masses of Australia and New Guinea connected under low sea-level and is reflected in the modern distribution of this species. This is a tribute to the Australian and New Guinea Fishes Association (which maintains the journal Fishes of Sahul) that has done much to promote and document native fishes of the region, especially rainbowfishes.
Ambiente: milieu / zona climatica / distribuzione batimetrica / gamma di distribuzione
Ecologia
; acqua dolce benthopelagico; pH range: 5.5 - 7.0; distribuzione batimetrica 0 - 1 m (Ref. 121823). Tropical
Oceania: Australia, Indonesia and Papua New Guinea.
Dimensione / Peso / Età
Maturità: Lm ? range ? - ? cm
Max length : 4.8 cm SL maschio/sesso non determinato; (Ref. 121823); 3.9 cm SL (female)
Breve descrizione
Chiavi di identificazione | Morfologia | Morfometria
Spine dorsali (totale) : 8; Raggi dorsali molli (totale) : 7 - 10; Spine anali: 1; Raggi anali molli: 15 - 17; Vertebre: 32 - 35. This species with well-contrasted dark lateral body stripes, is distinguished by the following set of characters: D V-VII, I,7-10 (mode 8); A I,15-17 (mode 16); total procurrent caudal rays 12-16 (mode 13); lateral scales 31-34 (mode 33); cheek scales often 9-12; total gill rakers on first arch 14-18; vertebrae 32-35 (mode 34); body very deep with greatest depth 2.6-3.7 (mean 3.0) in SL, greatest width 1.7-2.9 (mean 2.0) in HL; maxilla relatively long 3.2-4.2 (mean 3.6) in HL; long predorsal distance 1.8-2.2 (mean 2.0) in SL. Colouration: when alive silver to grey body with a series of black lateral stripes; fins with distinct contrasting colour zones, separated by a thick dark submarginal band, most distinct in nuptial males (Ref. 121823).
Cross section: compressed.
Known from large lateral floodplain systems and small swampy creeks, including dune lakes, with dense cover. Occurs in lily lagoons and is most frequently found in acid waters (pH 5.5-7.0). The largest fish recorded in wild was 4.06 cm SL (4.97 mm TL: AM I.21008-005; 4.84 cm SL from captive stock from Skull Creek, near Bamaga), and the fish attributable to this form (Skull Creek) grow larger in captivity (around 50 mm SL or 60 mm TL: NTM S.18153-001) (Ref. 121823).
Ciclo vitale e comportamento di accoppiamento
Maturità | Riproduzione | Deposizione | Uova | Fecondità | Larve
Hammer, M.P., G.R. Allen, K.C. Martin, M. Adams and P.J. Unmack, 2019. Two new species of dwarf rainbowfishes (Atheriniformes: Melanotaeniidae) from northern Australia and southern New Guinea. Zootaxa 4701(3):201-234. (Ref. 121823)
Stato della Lista Rossa IUCN (Ref. 130435: Version 2025-2 (Global))
Minaccia per l'uomo
Harmless
Usi umani
Pesca: commerciale; Acquario: Commerciale
Strumenti
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