乳色特鲶
概要
| 字段 | 值 |
|---|---|
| 类别 | 鱼 |
| 学名 | Tatia galaxias |
| 别名 | 乳色特鯰 |
| 分类 | 项鳍鲶科 Auchenipteridae › Tatia |
| 水体 | 淡水 |
| 原产地 | 哥伦比亚、委内瑞拉奥里诺科河流域 |
| 成体体长 | 12.6 cm |
| 饲养难度 | 中等 |
| 外部数据 | seriouslyfish tatia-galaxias;fishbase 47710 |
| 特征 | 夜行性: 是 |
水质参数
| 参数 | 耐受范围 | 最适范围 | 单位 |
|---|---|---|---|
| 水温 | 22–30 | — | °C |
| pH | 6–7 | — | — |
概述
乳色特鲶（Tatia galaxias）体色较深，散布星点般的小白斑，主要在夜间活动。它容易与外形相近的鱼混淆，不能只按商品名或单一颜色特征确认身份。
分布与栖息地
已知来自委内瑞拉和哥伦比亚的奥里诺科河流域，记录包括阿普雷、锡纳鲁科、阿塔巴波等水系及哥伦比亚梅塔河流域。既采到于清水，也见于酸性黑水和小溪；黑水个体一般更深色。
同属鱼通常利用缓流或静水区，白天躲在沉木、石缝，夜间接近岸边或河道中的水面活动。
饲养环境
群养可将约 100 cm 缸长作为保守起点，但这仍是依据体形作出的安排建议。具体布置可参考同属：用沉木形成许多狭窄缝隙，维持清洁和高溶氧。该类群对缺氧较不耐受，不能只关注藏身处而忽略水体供氧。
食性与喂食
同属自然食物包括小果实及无脊椎动物，也会在夜间捕食落到水面的昆虫。饲养本种可从熄灯后提供小型活饵、冷冻无脊椎饵开始，实际摄食接受情况仍需逐条观察，不能把同属食谱当作本种已验证的固定配方。
习性与混养
本种昼伏夜出，白天通常藏在缝隙中。同种及混养互动不宜仅按外观或同科常见性情推断，安排缸友时应保留观察空间。
雌雄区分
成熟雄鱼臀鳍前端鳍条增粗，较长鳍条形成尖端，并有明显而细长的生殖导管；雌鱼没有明显生殖突。雄鱼尾鳍上叶略长于下叶，雌鱼两叶长度相近。
繁殖
曾有 1990 年的缸内繁殖报道，但不能据此给出确定的操作流程。所属类群被认为通过体内授精繁殖，雄鱼改造臀鳍可能用于输送精子；具体交接动作仍属推测，不应写成已经观察到的本种行为。
补充说明
典型个体白斑较小、近圆形，尾鳍也常为深底白点，但同一产地能同时出现浅褐、深色甚至部分椭圆斑个体。鉴别时还要看较大的眼、较短吻等体形特征，花纹只能提供线索。
English
Overview
The dark body and scattered white spots of Tatia galaxias give it a starry appearance. It is mainly nocturnal and easily confused with similar catfishes. Neither a trade name nor a single color feature is sufficient for confident identification.
Distribution & habitat
It is known from the Orinoco drainage in Venezuela and Colombia, including the Apure, Cinaruco, Atabapo, and Meta systems. Collections include clear water, acidic blackwater, and small streams. Blackwater specimens are generally darker.
Members of its genus typically use still or slow water, sheltering among wood or rock crevices by day and moving near the surface after dark.
Aquarium setup
A length around 100 cm is a cautious starting suggestion for a group, based on body size rather than a documented space trial. Genus-level husbandry points toward wood arranged into numerous narrow retreats, clean water, and ample oxygen. The group's apparent intolerance of low oxygen makes aeration and circulation important alongside shelter.
Diet & feeding
The natural diet of the genus includes small fruits and invertebrates, with insects captured from the surface at night. For this species, small live and frozen invertebrates offered after dark provide a reasonable starting approach. Actual acceptance must be observed; the general diet of relatives is not a verified fixed feeding plan for every individual.
Behaviour & compatibility
This species hides in crevices during the day and becomes active at night. Its interactions with conspecifics and other fishes should be observed rather than inferred from appearance or the reputation of related catfishes.
Sexual dimorphism
Males develop thickened anterior anal-fin rays forming a pointed tip, together with a visible slender genital duct. Females lack an obvious papilla. The upper tail lobe is slightly longer in males, whereas female lobes are approximately equal.
Breeding
An aquarium breeding report appeared in 1990, but this does not establish a detailed reproducible procedure. Internal insemination is thought to occur in the wider group. The altered male anal fin may direct sperm, while the proposed physical mating action remains an inference rather than a confirmed observation for this species.
Notes
Small, usually rounded white spots and a dark, spotted tail are typical, but pale brown, dark, and partly oval-spotted forms can occur together. Larger eyes and a shorter snout also assist identification. Pattern should therefore be treated as one clue among several.
来源
- https://www.seriouslyfish.com/species/tatia-galaxias(抓取于 2026-10-10)
tatia-galaxias · 文件: data/species/tatia-galaxias.md · 状态: 草稿