Description

The emperor tetra (Nematobrycon palmeri) is a small, peaceful freshwater fish, commonly available in the aquarium hobby. Emperor tetras are considered to be one of the best fish for community tanks, and they do well with most species of non-aggressive fish.

Native to Columbia, these fish are endemic to the Atrato and San Juan river basins. They are primarily found in clear, slow-moving streams and rivers, with sandy, rocky, or muddy bottoms.

On average, these fish will live between 3-5 years in a well-maintained aquarium, but there are reports of some specimens living longer. Emperor tetras grow to a maximum size of 2 inches (5 cm), with the males being slightly larger than the females.

帝王鱼（Nematobrycon palmeri）是一种小型、性情温和的淡水鱼，常见于水族爱好者中。帝王四目鱼被认为是社区水族箱中最好的鱼类之一，它们与大多数非攻击性鱼类都能相处得很好。

这些鱼原产于哥伦比亚，是阿特拉托和圣胡安河流域的特有种。它们主要出现在清澈、流速缓慢的溪流和河流中，底部有沙质、岩石或泥泞。

平均而言，这些鱼在维护良好的水族箱中可存活 3 至 5 年，但有报道称某些标本的寿命更长。帝王四体最大可长至 2 英寸（5 厘米），雄性略大于雌性。