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The recommended male-to-female ratio is about 1:3, due to the polygamous behavior of dominant males. Threadfin rainbowfish do well in aquariums of 20 US gallons (76 L), however 30 US gallons (110 L) is preferred. They are best housed in a "species only" tank; meaning that the tank is reserved for the Threadfins alone.
A Boesemani rainbowfish in an aquarium. M. boesemani is also available in the aquarium hobby, where it is prized for its excellent colours and peaceful demeanor. The colour pattern is completely different from most other forms of rainbowfish, as it has a half orange-red rear and a bluish-grey or purple front which in some specimens is almost defined perfectly.
In a home setting, these fish need well-oxygenated water with a pH level of 6.8 – 7.2, optimal temperatures varying between 72 and 82 °F (22–28 °C), and plenty of aquatic plants to give them hiding places amid their school. If properly cared for, Rainbowfish can live up to 5 years in captivity. [5]
When examining the rainbow darter, life history traits were: average size 45 mm, growth 32 mm, maximum age four years, and clutch size 82. [8] E. caeruleum mates during the spring, typically when water temperature is between 17 and 18 °C, and they will leave their normal microhabitat in the rapids to congregate on pebbles, where the stream ...
The Murray River rainbowfish (Melanotaenia fluviatilis), [2] known less commonly as the Australian rainbowfish, is a species of freshwater fish endemic to southeastern Australia. The southernmost species of all rainbowfishes , these fish are very colourful, hence the name; and there is sexual dimorphism with the males being larger and more ...
Australian rainbowfish are popular aquarium fish along with Pseudomugil blue-eyes, which are another small, colourful fish found in a similar range and habitats. In the wild, some rainbowfish populations have been severely affected by the aggressive introduced eastern mosquitofish ( Gambusia holbrooki ), tilapia cichlids, and pollution.