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The spotted blue-eye is found in rivers in southern New Guinea, the Aru Islands, and the Northern Territory and Cape York Peninsula (Queensland) in Australia. Their habitat includes small slow-moving streams, often less than 60 cm (2 ft) deep, pools, and Melaleuca or Pandanus swamps. [2]
Melanotaenia duboulayi, the crimson-spotted rainbowfish, less commonly known as the Duboulay's rainbowfish, [2] is a species of freshwater fish endemic to coastal eastern Australia, although M. duboulayi has also been kept as an aquarium fish since the early 20th century, and is the original "Australian rainbowfish".
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.
Melanotaenia caerulea G. R. Allen, 1996 (Blue rainbowfish) Melanotaenia catherinae (de Beaufort, 1910) (Waigeo rainbowfish) Melanotaenia corona G. R. Allen, 1982 (Corona rainbowfish) Melanotaenia duboulayi (Castelnau, 1878) (Crimson-spotted rainbowfish) Melanotaenia dumasi M. C. W. Weber, 1907 (Omba rainbowfish) [3]
The Pacific blue-eye generally reaches a total length of around 3–3.5 cm (1 + 1 ⁄ 8 – 1 + 3 ⁄ 8 in) long; males can reach 8.8 cm (3 + 1 ⁄ 2 in) and females 6.3 cm (2 + 1 ⁄ 2 in). [4] The size of Pacific blue-eyes found north of the Burdekin Gap increases directly with distance from the gap, males and females being the same size.
The Pseudomugilidae, the blue-eyes, are a subfamily of atheriniform fish in the rainbowfish family Melanotaeniidae. [1] They inhabit fresh and brackish water in Australia, New Guinea and nearby smaller islands. [2] Blue-eyes are small fish, typically no more than 5 cm (2.0 in) in length.
The doomsday fish got its name because it looks like a mythical sea creature, with a long, ribbon-shaped body that can grow up to 30 feet.
Forktail blue-eye: Pseudomugil furcatus: 4–5 cm (1.6–2.0 in) These fish need a larger aquarium than their size suggests. Though they only grow to a length of about 2 inches, they are happiest in groups of 8 – 10 or more, and they appreciate lots of swimming space. [67] 75 - 79 °F (24 - 26 °C) [67] 6.5 - 8.0 [67] Neon blue-eye