Akysis longifilis · Sittaung Stream Catfish
概要
| 字段 | 值 |
|---|---|
| 类别 | 鱼 |
| 学名 | Akysis longifilis |
| 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 | 5.3 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-longifilis;fishbase 62593 |
| 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 longifilis 是体形小、鼻须和上颌须明显较长的溪流鲶鱼，背鳍到尾鳍之间有两块浅色鞍斑。它常把身体埋进砂里，饲养应留出柔软砂面，而不只堆满石头。
分布与栖息地
模式系列采于缅甸南部勃固地区锡当江支流彪溪，可能在该水系有更广分布。其属多生活在砂、砾、石组成的急流溪河，常有落叶或倒木，但沉水植物不多。
饲养环境
提供柔软细砂，鱼有时会完全埋身或只露眼睛。水磨石、树根与沉木间留出缝隙；附着在石木上的水草和莫丝不易被钻砂扰动，也可加落叶。
不耐有机污染累积，需要洁净水、高溶氧及良好水流，每周换水 30–50%。
食性与喂食
本属主要夜间捕食微小动物，人工可用丰年虾、水蚤、红虫等小型活饵或冷冻饵。刚开始最好在暗后投喂，适应后可能会在喂食时出来。干粮不一定接受，太大的饵料要切小。
习性与混养
不善与大型或强势鱼竞争，可配温和小型群居鲤科鱼、同体形脂鲤及适合的小型溪流鲶鱼、吸鳅。其他鳅类需检查领地性和成体大小。已有与淡水虾和平共处的记录，同种间不具攻击性，可单尾或多尾饲养。
繁殖
本种繁殖尚未报道。另一同属鱼曾在降温后繁殖，可作为探索线索，但其受精、孵化和幼鱼发育过程不能直接套成本种记录。
补充说明
同水系近似鱼可用脂鳍基部长短、嘴大小及俯视头形区分，单靠腹鳍和臀鳍褐斑并不可靠。该科背鳍、胸鳍棘可造成疼痛刺伤，维护和转移时应避免直接抓握。
图片
图片来自 SeriouslyFish,版权归各摄影者所有。
English
Overview
Long nasal and maxillary barbels and two pale saddles behind the dorsal fin help identify Akysis longifilis. This small stream catfish spends time buried, so leave accessible soft sand rather than covering the entire floor with rocks.
Distribution & habitat
The type series came from Pyu stream in the Sittaung drainage of Bago, southern Myanmar. A wider distribution within that basin is possible. Typical genus habitats are fast streams over sand, gravel, and rock, sometimes with leaves or fallen wood but little submerged vegetation.
Aquarium setup
Provide soft sand for full burial or resting with only the eyes exposed. Worn stones, roots, and branches should offer narrow retreats. Attached plants and mosses avoid disturbance from burrowing, and leaves may be included.
Maintain clean, well-oxygenated moving water and change 30–50% weekly, since organic pollution is poorly tolerated.
Diet & feeding
Members of the genus are mainly nighttime micropredators. Offer small live or frozen Artemia, Daphnia, and bloodworms, initially after dark. Settled fish may emerge at feeding time. Dry foods are not always accepted, and larger pieces may need chopping.
Behaviour & compatibility
Avoid large or forceful competitors. Small peaceful schooling cyprinids, similar-sized characins, suitable stream catfish, and hillstream loaches are candidates. Assess other loaches for adult size and territorial behavior. Peaceful coexistence with freshwater shrimp has been observed, and it tolerates its own kind either singly or in groups.
Breeding
Breeding of this species is unreported. Spawning after cooling in a related species provides an experimental clue, not a species-specific record of fertilization, incubation, or fry development.
Notes
A similar local species differs in adipose-base length, mouth size, and head outline. Brown pelvic and anal markings alone are unreliable. Dorsal and pectoral spines in this family can cause painful stings, so avoid direct grasping during handling or maintenance.
来源
- https://www.seriouslyfish.com/species/akysis-longifilis(抓取于 2026-10-10)
akysis-longifilis · 文件: data/species/akysis-longifilis.md · 状态: 草稿