| 词条 | Threadfin rainbowfish |
| 释义 |
| name = Threadfin rainbowfish | image = Iriatherina_Werneri-Male_group.jpg | image_width = 250px | regnum = Animalia | phylum = Chordata | classis = Actinopterygii | ordo = Atheriniformes | familia = Melanotaeniidae | genus = Iriatherina | genus_authority = Meinken, 1974 | species = I. werneri | binomial = Iriatherina werneri | binomial_authority = Meinken, 1974 }} The threadfin rainbowfish or featherfin rainbowfish (Iriatherina werneri) is a rainbowfish, the only species in the genus Iriatherina. It is characterized by long beautiful fins, and is among the most attractive of the rainbowfishes. It is native to freshwater swamps and demersal or thickly vegetated areas of flowing waters, in tropical northern Australia and New Guinea. It grows up to {{convert|5|cm|in|abbr=on}} in length, but this does not include the Threadfin's long tail. Sexing is easy by examining fins: males have larger, gaudier finnage than females. Males also have more intense colours. When reproduction takes place eggs are scattered among fine leaved plants, and hatch after 8–12 days. In the aquariumIn aquaria they are usually peaceful, they live preferably in groups of six or more. Because of their long fins they should obviously be kept in a tank without fin-nippers. They breed best in tanks without other species. The male courts the female by posturing in front of her repeatedly quickly raising then lowering the forward dorsal fin. The recommended male-to-female ratio is about 1:3, due to polygamous behavior of dominant male. Threadfin Rainbowfish do well in aquariums of {{convert|20|USgal|L}}, however {{convert|30|USgal|L}} is preferred. They are best housed in a "species only" tank; meaning that the tank is reserved for the Threadfins alone. Because of their tiny mouths, they can be difficult to feed. They do well with live foods, such as baby brine shrimp, and the micrometre larval diets. They prefer water that is soft to moderately hard, slightly acidic (pH 6.0–7.0), and with a temperature of {{convert|23|–|29|C|F}}. References
4 : Melanotaeniidae|Freshwater fish of Australia|Freshwater fish of New Guinea|Fish described in 1974 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。