Akysis portellus · Smallmouth Stream Catfish
概要
| 字段 | 值 |
|---|---|
| 类别 | 鱼 |
| 学名 | Akysis portellus |
| 别名 | Rautenflecken-Zwergwels |
| 分类 | 鲶形目 Siluriformes › 粒鲶科 Akysidae › Akysis |
| 水体 | 淡水 |
| 原产地 | 缅甸南部勃固地区锡当江水系 |
| 成体体长 | 4.3 cm |
| 饲养难度 | 中等 |
| 最小水体 | 41 L |
| 最小缸长 | 45 cm |
| 群居方式 | 群游 |
| 性情 | 温和 |
| 水流偏好 | 高 |
| 外部数据 | seriouslyfish akysis-portellus;fishbase 64863 |
| 特征 | 翻底砂: 是 |
水质参数
| 参数 | 耐受范围 | 最适范围 | 单位 |
|---|---|---|---|
| 水温 | 16.5–24 | — | °C |
| pH | 6–7.5 | — | — |
| 总硬度 | 2–12 | — | dGH |
概述
Akysis portellus 是嘴较小、脂鳍基部较短的小型溪流鲶鱼，与同水系近似种很容易混淆。它不擅长抢食，柔软砂底、遮蔽和合适的小型伙伴比热闹的普通混养更重要。
分布与栖息地
模式产地在缅甸南部勃固地区锡当江支流瑞金溪，可能在锡当江流域分布更广。同属鱼常见于急流溪河，底部有砂、砾和岩块，局部有落叶与树根；雨季水量和浑浊度可上升。
饲养环境
铺柔软细砂让鱼埋身或只露眼睛，再用水磨石和沉木根枝制造窄缝。可用附着型水草、莫丝及落叶，不易因钻砂活动移位。
保持高溶氧、充分水流与清洁水质，每周换水 30–50%，避免有机污染累积。
食性与喂食
参照本属夜间微型捕食习性，规律提供适口丰年虾、水蚤、红虫等活饵或冷冻饵，必要时切碎。刚入缸可在暗后投食，之后可能习惯正常喂食时间。干粮可能不接受，不宜把它作为唯一选择。
习性与混养
避开大型、凶猛或抢食很强的鱼。温和微型群居鱼、体形相近的小型溪流鲶鱼及合适吸鳅较可考虑，其他鳅类须逐种评估大小和领地性。同种之间和平，可单养或成组；也有与淡水虾和平共处的经验。
繁殖
本种尚无繁殖报告。近亲降温后产卵的案例只能提供尝试方向，不能据此确定本种的诱发条件或孵化周期。
补充说明
俯视头部较圆，嘴小且脂鳍基部较短，可辅助区分近似鱼；鳍上褐斑存在个体差异，不宜作为唯一标准。背鳍和胸鳍棘有刺伤风险，维护与转移时避免手抓。
图片
图片来自 SeriouslyFish,版权归各摄影者所有。
English
Overview
A small mouth and relatively short adipose-fin base help distinguish Akysis portellus from a similar fish in the same drainage. This small stream catfish is a weak competitor, needing soft sand, shelter, and appropriately modest companions.
Distribution & habitat
The type site is Shwe Kyin stream, a Sittaung tributary in southern Myanmar’s Bago Region. Wider occurrence within the basin is possible. Genus habitats typically have flowing water over sand, gravel, and stones, with scattered leaves or roots and increased flow and turbidity during rains.
Aquarium setup
Use soft sand for burying and arrange worn stones and branching wood into narrow retreats. Attached plants, mosses, and leaves can be used without relying on rooted vegetation that burrowing might disturb.
Keep water clean, oxygen-rich, and moving, with 30–50% weekly changes to control organic waste.
Diet & feeding
Follow the genus’s nocturnal micropredatory feeding pattern with small live or frozen Artemia, Daphnia, and bloodworms, chopping food when necessary. Start after dark; settled fish may respond at ordinary feeding times. Dry preparations can be refused, so do not rely on them alone.
Behaviour & compatibility
Avoid large, aggressive, or highly competitive fishes. Peaceful miniature shoalers, comparable stream catfish, and suitable hillstream loaches are candidates; assess other loaches individually. Conspecifics coexist peacefully, allowing single or group care, and successful combinations with freshwater shrimp have been observed.
Breeding
Breeding remains unreported. A relative’s response to cooling suggests a possible avenue for trials, without establishing this species’ trigger or incubation schedule.
Notes
A rounded head from above, small mouth, and shorter adipose base help separate similar fish. Fin blotches vary and should not be the sole criterion. Dorsal and pectoral spines can sting, so avoid grasping the fish by hand.
来源
- https://www.seriouslyfish.com/species/akysis-portellus(抓取于 2026-10-10)
akysis-portellus · 文件: data/species/akysis-portellus.md · 状态: 草稿