科: Melanotaeniidae
石美人为虹银汉鱼科鱼类，和平但活跃，需要开阔泳动空间，原生分布于南美洲及菲律宾。虹彩是诚实的状态信号：体色与状态随水质与年龄一起变化。成体约 6.8–9.9 cm，群游性，8 尾以上长缸最佳，适宜水温 27–30 °C。缸要长，群要大，水要清。
Melanotaenia boesemani, a member of the family Melanotaeniidae, comes from N Australia & New Guinea, where it inhabits warm freshwater streams and lakes. Peaceful but energetic; needs open swimming room and eager eater; varied diet maintains iridescence, it grows to 6.8–9.9 cm and adapts well to a properly set-up aquarium in the 27–30 °C range. Other Melanotaenia species in our database include Melanotaenia praecox.
中等难度，稳定水质比高端设备更关键。Peaceful but energetic; needs open swimming room，Shoaling; 8+ in a long tank unlocks full colour。
水温控制在 27–30 °C，重点是稳定。Stable temperature matching the species origin。
成体 6.8–9.9 cm 左右，因其Bottom-dwelling的习性，118 L 以上的缸更合适。
Eager eater; varied diet maintains iridescence。建议人工饲料搭配冷冻或活饵，保证多样性。
Peaceful but energetic; needs open swimming room。推荐混养：Robust peaceful cyprinids — Add motion without menace。避免与Small timid fish — Outcompeted at feeding time同缸。
分布于大洋洲（新几内亚）：Warm freshwater streams and lakes，Still to gentle current。
无明显跳缸倾向，常规缸盖即可。
Spawns among plants at dawn; no parental care。Subtle external differences。