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It requires a temperature of 24 °C (75 °F) to 28 °C (82 °F). The fish is intolerant of stagnant water, being susceptible to bacterial infections, making it necessary to change about 30% of the aquarium water twice a month. Aquatic plants help reduce its natural skittishness. [2] The knife livebearers are best kept in a single species aquarium.
Brachyrhaphis roseni was scientifically described by William Bussing in 1988, but was known to livebearers enthusiasts from the 1960s. [3] It grows to 6 cm. The fish have a slightly arched body and twelve dark vertical stripes, which are normally more prominent in males. The dorsal fin is half orange with a dark margin.
Limia is a genus of livebearing fishes belonging to the Cyprinodontiform family Poeciliidae.It comprises 22 described species found in fresh, brackish, saltwater, and hypersaline habitats of the Greater Antilles islands in the Caribbean Sea.
Livebearers are fish that retain their eggs inside the body and give birth to live, free-swimming young. They are especially prized by aquarium owners. They are especially prized by aquarium owners. Among aquarium fish, livebearers are nearly all members of the family Poeciliidae and include: guppies , mollies , platies and swordtails .
The species prefers fast-flowing and shallow water, usually around 50 cm (20 in) deep. It is also found in flooded areas. [ 4 ] [ 5 ] One examined habitat was a small, 10–20 cm (3.9–7.9 in) deep stream with a muddy substrate, while the Blue Hole River habitat contains a rocky substrate.
The sailfin molly is a tolerant species, as it can exploit the thin film of oxygen-rich surface water with its upturned mouth, so is able to survive oxygen-depleted habitats. A euryhaline species, the sailfin molly may be found in a variety of saline environments, tolerating salinities as high as 87 ppt [10] and breeding in brackish waters.
The guppy (Poecilia reticulata), also known as millionfish or the rainbow fish, [3] is one of the world's most widely distributed tropical fish and one of the most popular freshwater aquarium fish species. It is a member of the family Poeciliidae and, like almost all American members of the family, is live-bearing. [4]
[2] [3] The members in the family are mainly found in fresh and brackish water of tropical Asia and New Guinea, but the genus Zenarchopterus also includes marine species from the Indo-Pacific. Several, such as the wrestling halfbeak , have become commonly traded aquarium fish .