Garcialebias Nigrofasciatus (Garcialebias nigrofasciatus) is a ray-finned fish. It inhabits freshwater waters. This species can reach a maximum total length of 5.8 cm. With a trophic level of 3.2, it is a low-level carnivore, feeding on invertebrates and small organisms. It is assessed as Endangered on the IUCN Red List.
Dorsal spines (total): 0; Dorsal soft rays (total): 16 - 23; Anal spines: 0; Anal soft rays: 18 - 26; Vertebrae: 27 - 30. Two apomorphic color patterns, body bright gray with dark gray to black stripes in males (versus light gray or no stripes) and a vertically paired black blotch on caudal peduncle of juveniles and females (versus small spots irregularly arranged, or a single round dorsally positioned spot, or no spots on caudal peduncle). Males with light blue stripes parallel to rays on the basal half of unpaired fins and a black blotch anteriorly bordered by a narrow blue line on posterior portion of dorsal and anal fins. Scales on longitudinal series 26-28, supraorbital neuromasts 16-19, pharyngobranchial teeth 2-5. Dorsal fin origin anterior to anal fin origin in females. Caudal fin rounded.: elongated.
Behavioural data for Garcialebias Nigrofasciatus is currently being reviewed.
Freshwater; benthopelagic; non-migratory. Tropical South America: inner drainages between laguna dos Patos and lagoa Mirim, southern Brazil.
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