多鳞狼牙脂鲤 · Red Barracuda Tetra
概要
| 字段 | 值 |
|---|---|
| 类别 | 鱼 |
| 学名 | Acestrorhynchus altus |
| 别名 | 多鱗狼牙脂鯉、Roter Hundssalmler |
| 分类 | 脂鲤目 Characiformes › 狼牙脂鲤科 Acestrorhynchidae › Acestrorhynchus |
| 水体 | 淡水 |
| 原产地 | 巴西 |
| 成体体长 | 23.3 cm |
| 饲养难度 | 中等 |
| 最小水体 | 2025 L |
| 最小缸长 | 250 cm |
| 群居方式 | 群游 |
| 特征 | 吃小鱼: 是;会跳缸: 是 |
| 外部数据 | seriouslyfish acestrorhynchus-altus;fishbase 51076 |
| 食性 | 肉食 |
水质参数
| 参数 | 耐受范围 | 最适范围 | 单位 |
|---|---|---|---|
| 水温 | 22–28 | — | °C |
| pH | 6–7.5 | — | — |
| 总硬度 | 1–12 | — | dGH |
概述
多鳞狼牙脂鲤（Acestrorhynchus altus）是需要大面积开阔水域的食鱼性脂鲤。鳃盖后近圆形的黑斑可帮助归类，却不足以准确区分几种非常相似的近亲；购入时保留采集地信息很有价值。
分布与栖息地
模式产地在巴西帕拉州马拉若岛的阿拉里河。本种可能局限于亚马孙河下游及部分支流，以前归入它的巴拉那河、乌拉圭河一带种群已另作其他种处理，因此不能沿用旧的广泛分布。生活于大河主槽和支流，雨季常进入洪泛区。
饲养环境
长期饲养至少参考 250 × 90 厘米底面，幼鱼也不能因体型小就挤在小缸，受惊快速游动容易撞玻璃。它主要生活在开阔水域，过多遮蔽物反而会带来压力。细砂上可少量放落叶和枝根，种植也要让出主体游动空间。
缸盖必须严密。使用成熟而有力的外滤或底滤，出水带动水面，配合每周 30%–50% 换水。它对有机污染和水质突变敏感，不宜放入刚建立、过滤生物系统尚未成熟的缸。
食性与喂食
属于专性食鱼者，能吞下相对自身体型不小的猎物。新到个体可能只认活鱼，多数适应后可逐步接受非活饵，部分还会学吃干饲料。不要依赖普通活饵鱼，疾病、寄生虫及未经调理的营养问题都需考虑；牛心、禽肉等也不宜喂食。
习性与混养
与大到不能吞食的伙伴相处通常较平和，避免强领地或抢食很猛的鱼。可考虑适当体型的温和慈鲷、鲶类和其他脂鲤，但大小必须足够。幼鱼群游倾向强，成鱼较独立却仍会结群，建议至少四尾且大小接近；狼牙脂鲤有同类相食风险，新添小鱼尤其不安全。
雌雄区分
性成熟雌鱼通常比雄鱼略大，身体也更高厚。
繁殖
繁殖可参考同属近亲在中层水中散卵的观察：雄鱼绕静止雌鱼作八字形游动，散出大量卵且不护卵。但这属于近亲行为参考，不能当作本种已验证的人工繁殖流程。
图片
图片来自 SeriouslyFish,版权归各摄影者所有。
English
Overview
An open-water fish predator, Acestrorhynchus altus needs a spacious aquarium. Its roughly circular dark mark behind the gill cover identifies a group of similar relatives rather than the species reliably on its own. Collection locality is valuable when establishing identity.
Distribution & habitat
The type locality lies on the Arari River, Marajó Island, Pará, Brazil. The range may be restricted to the lower Amazon and tributaries; southern populations formerly assigned to it are now treated separately. It uses main channels and tributaries, moving into flooded areas during the wet season.
Aquarium setup
A footprint around 250 by 90 cm is suggested for long-term housing. Juveniles also need room because startled fish can strike the glass. Excessive cover can be stressful: preserve a large clear swimming area, with sand, modest leaf litter, and a few branches if desired.
Use a secure lid and mature, efficient canister or sump filtration, with returns moving the surface. Weekly water changes of 30–50% support clean conditions. Organic pollution and abrupt chemistry changes are poorly tolerated, so biologically immature tanks are unsuitable.
Diet & feeding
An obligate fish-eater, it can handle surprisingly substantial prey. New imports may initially recognize only live fish, but many can be transitioned to dead food and some to dry products. Routine feeder fish bring disease, parasite, and nutritional concerns; mammalian and avian meats are also inappropriate.
Behaviour & compatibility
It is generally placid toward fish beyond swallowing size. Avoid territorial or highly competitive companions; suitably sized peaceful cichlids, catfish, or characins are options. Juveniles school strongly, while older fish become less cohesive but still assemble. Four or more similarly sized individuals are suggested because smaller members risk being eaten.
Sexual dimorphism
Mature females tend to be somewhat larger and deeper-bodied than males.
Breeding
Observations of a related species describe a male circling a stationary female in looping figure-eight movements, followed by numerous eggs released in midwater without parental care. This is a comparison with a congener, not a demonstrated captive method for this species.
来源
- https://www.seriouslyfish.com/species/acestrorhynchus-altus(抓取于 2026-10-10)
acestrorhynchus-altus · 文件: data/species/acestrorhynchus-altus.md · 状态: 草稿