直角平鳍鳅 · Saddle-back Loach
概要
| 字段 | 值 |
|---|---|
| 类别 | 鱼 |
| 学名 | Homaloptera orthogoniata |
| 别名 | 直角平鰭鰍 |
| 分类 | 鲤形目 Cypriniformes › 爬鳅科 Balitoridae › Homaloptera |
| 水体 | 淡水 |
| 原产地 | 印度尼西亚、马来西亚 |
| 成体体长 | 9.5 cm |
| 饲养难度 | 中等 |
| 最小水体 | 108 L |
| 最小缸长 | 120 cm |
| 群居方式 | 群游 |
| 水流偏好 | 高 |
| 特征 | 会跳缸: 是 |
| 外部数据 | seriouslyfish homaloptera-orthogoniata;fishbase 22877 |
水质参数
| 参数 | 耐受范围 | 最适范围 | 单位 |
|---|---|---|---|
| 水温 | 20–25.5 | — | °C |
| pH | 6–7.5 | — | — |
| 总硬度 | 1–10 | — | dGH |
概述
直角平鳍鳅（Homaloptera orthogoniata）背部有三块较大的鞍形暗斑，最后一块在背鳍与尾鳍之间。这个名称经常被用于近似鱼，真正本种的身份和分布应先核对，再按急流爬鳅的需要安排环境。
分布与栖息地
目前确认原生婆罗洲，包括马来西亚砂拉越及印度尼西亚加里曼丹的多条水系，过去泛指中南半岛的范围不宜沿用。生活在清澈、富氧的急流和上游，底部多砂砾、岩石及基岩，水草不多而岸边植被发达。
饲养环境
长期底面积至少参考 120 × 30 厘米，砂砾底搭配大小圆石，沉木根枝及耐受附生植物可作休息面。以强过滤维持清洁，按需加造流和气石，每小时循环可参考水体的 10–15 倍。稳定成熟后再放鱼，定期部分换水但保留附着生物，严密加盖防攀爬。
食性与喂食
可参考同属刮食生物膜、小型甲壳类和昆虫幼虫等食物的方式。石面附着物应持续保留，定期投喂水蚤、丰年虾或红虫等活冷冻饵，部分下沉干粮可能接受。瘦弱个体先减少竞争，确保持续吃到合适食物。
习性与混养
不好斗，但混养伙伴须适应流水和高溶氧，相似爬鳅之间可能有轻微争执。建议六尾以上同养，小群较不大胆，有时会彼此靠近并共同迎流排列。
雌雄区分
成熟雌鱼通常稍大、体形更厚实。
补充说明
三块宽而清晰的鞍斑分别在头后、背鳍基部及背鳍后方，尾鳍基部另有暗色。近似种可能只有两块鞍斑，或带更多不规则上半身斑块，辨认时应看整套图案。
图片
图片来自 SeriouslyFish,版权归各摄影者所有。
English
Overview
Three large dorsal saddles characterize Homaloptera orthogoniata, with the last between the dorsal and caudal fins. Its name is frequently applied to lookalikes, so confirming identity matters before interpreting locality or aquarium claims.
Distribution & habitat
Confirmed native records are Bornean, including Sarawak and Kalimantan drainages, rather than the much wider historical Indochinese range. Clear oxygenated streams and headwaters have rocky beds, limited aquatic plants, and substantial riparian vegetation.
Aquarium setup
Provide at least a 120 by 30 cm footprint with rounded rocks over sand or gravel. Wood and hardy attached plants create resting places. Strong filtration with additional circulation or aeration should support the suggested turnover of 10–15 tank volumes per hour. Use a stable mature setup, retain biofilm during maintenance, and secure the cover.
Diet & feeding
Genus-level feeding guidance combines biofilm and small invertebrates. Retain established surfaces and supply regular live or frozen prey; sinking dry foods may also be accepted. Emaciated arrivals need reliable access to suitable food without competition before community placement.
Behaviour & compatibility
It is not aggressive, although similar loaches may have minor disputes. Environmental needs restrict suitable companions. Groups of at least six are recommended, since smaller numbers are less confident; fish may gather closely while facing into the flow.
Sexual dimorphism
Mature females are generally somewhat larger and fuller-bodied.
Notes
The three broad saddles lie behind the head, across the dorsal base, and farther back, with additional dark pigmentation at the tail base. Lookalikes can have two saddles or more irregular upper-body markings, so inspect the complete pattern.
来源
- https://www.seriouslyfish.com/species/homaloptera-orthogoniata(抓取于 2026-10-10)
homaloptera-orthogoniata · 文件: data/species/homaloptera-orthogoniata.md · 状态: 草稿