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电光美人鱼 (Dwarf Neon Rainbowfish) - Melanotaenia praecox
电光美人鱼（Melanotaenia praecox）虽然在饲养上不算特别挑剔，但由于它们对环境压力相当敏感，因此并不是新手入门或在尚未稳定的新缸中投放的理想选择。然而，对于有经验的玩家来说，这些极具魅力的鱼儿绝对是水族箱中的点睛之笔。试想一下，一群闪烁着金属光泽的电光美人在植被茂密的社区缸中穿梭，那场面简直是一场流动的视觉盛宴。为了让它们展现出最佳状态，建议群养数量不少于六条，这样能显著提升水族箱中上层空间的动感与色彩层次。
- 拉丁学名：Melanotaenia praecox
- 分类学：辐鳍鱼纲 Actinopterygii → 银汉鱼目 Atheriniformes → 虹银汉鱼科 Melanotaeniidae → 虹银汉鱼属 Melanotaenia