三线铅笔 (Nannostomus marginatus)

科: Lebiasinidae

三线铅笔为鳉脂鲤科鱼类，温和的 mid-water 群游鱼，数量越多越自信，原生分布于南美洲。中上层群游鱼，体色与胆量随群体一起到来。成体约 2.6–3.9 cm，至少 8 尾，越多越好，适宜水温 24–26 °C。群要大，光要柔。

饲养参数

水温: 24–26 °C
pH: 5.8–7.5
GH 硬度: 5–19 dGH
成体体长: 2.6–3.9 cm
最小缸体: 25 L
水层: Bottom-dwelling
饲养难度: 中等
性情: Peaceful mid-water shoaler; confidence comes in numbers
产地: 南美洲

物种概述

A Lebiasinidae species native to South America: Nannostomus marginatus lives bottom-dwelling over warm freshwater streams and lakes. Peaceful mid-water shoaler; confidence comes in numbers. Adults reach 2.6–3.9 cm. It is one of the aquarium-kept Nannostomus species we profile, alongside Nannostomus beckfordi, Nannostomus eques, Nannostomus harrisoni.

原生生境

栖息地: Warm freshwater streams and lakes
水流: Still to gentle current
溶氧: Moderate oxygen levels

造景与硬件

底床: Fine sand and gravel
硬景观: Driftwood and smooth stones
水草: Hardy common aquarium plants

性格食性与混养

群游性: Groups of 8 minimum; more is visibly better
食性: Small omnivore; quality flakes and small frozen foods
推荐混养: Other small peaceful tetras and rasboras — Form a mixed, calm mid-water mass
避免混养: Single-species isolation — A lone tetra is a stressed tetra

繁殖与备注

雌雄差异: Subtle external differences
繁殖方式: Typical egg-scattering characin; adults eat the eggs

常见问题

三线铅笔好养吗？

饲养难度：中等。Peaceful mid-water shoaler; confidence comes in numbers。

三线铅笔适合什么水温和水质？

水温控制在 24–26 °C，重点是稳定。Stable temperature matching the species origin。

三线铅笔能长多大，需要多大的缸？

成体 2.6–3.9 cm 左右，因其Bottom-dwelling的习性，25 L 以上的缸更合适。

三线铅笔吃什么？

Small omnivore; quality flakes and small frozen foods。建议人工饲料搭配冷冻或活饵，保证多样性。

三线铅笔能和其他鱼混养吗？

可以。Peaceful mid-water shoaler; confidence comes in numbers，适合与Other small peaceful tetras and rasboras — Form a mixed, calm mid-water mass混养。避开Single-species isolation — A lone tetra is a stressed tetra。

三线铅笔产自哪里？

产地为南美洲，典型栖息地是Warm freshwater streams and lakes，对溶氧要求一般。

三线铅笔会跳缸吗？

换水与维护期间建议加盖，防止惊跳。

三线铅笔怎么繁殖？

人工环境下：Typical egg-scattering characin; adults eat the eggs。Subtle external differences。