Environment: milieu / climate zone / depth range / distribution range
Freshwater; brackish; benthopelagic; pH range: 5.2 - 5.6; dH range: 10 - ?. Tropical; 18°C - 24°C (Ref. 2060)
Oceania: occurs only in Australia.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 10.0 cm TL male/unsexed; (Ref. 7020); common length : 6.0 cm SL male/unsexed; (Ref. 44894)
Inhabits rainforest streams, lily lagoons and small streams. Also occurs in larger streams, usually in backwaters or along the shoreline where there is minimal flow and grassy vegetation. Often found in brackish coastal waters (Ref. 7020, 44894). Temperature and pH ranges are 23°-28°C and 5.5-7, respectively (Ref. 44894). Feeds mainly on aquatic and terrestrial insects and their larvae, and also filamentous green algae. Usually co-occurs with other species of rainbows and blue-blue eyes. A popular aquarium species which thrives in captivity. Type species (first species to be described) of the family Melanotaeniidae (Ref. 44894).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Deposits thread-bearing eggs on plants. Distinct pairing (Ref. 205).
Allen, G.R., 1989. Freshwater fishes of Australia. T.F.H. Publications, Inc., Neptune City, New Jersey. (Ref. 5259)
IUCN Red List Status (Ref. 126983)
Threat to humans
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref. 93245
Trophic level (Ref. 69278
): 2.9 ±0.35 se; based on food items.
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Spawns throughout the year (Ref. 5259
Fishing Vulnerability (Ref. 59153
): Low vulnerability (10 of 100).