Phenacogaster tegatus
概要
| 字段 | 值 |
|---|---|
| 类别 | 鱼 |
| 学名 | Phenacogaster tegatus |
| 别名 | Vesicatrus tegatus |
| 分类 | 脂鲤目 Characiformes › 脂鲤科 Characidae › Phenacogaster |
| 水体 | 淡水 |
| 原产地 | 阿根廷、巴西、巴拉圭 |
| 成体体长 | 4.5 cm |
| 饲养难度 | 入门 |
| 最小水体 | 54 L |
| 最小缸长 | 60 cm |
| 群居方式 | 群游 |
| 性情 | 温和 |
| 外部数据 | seriouslyfish phenacogaster-tegatus;fishbase 52053 |
水质参数
| 参数 | 耐受范围 | 最适范围 | 单位 |
|---|---|---|---|
| 水温 | 20–28 | — | °C |
| pH | 6–7.5 | — | — |
| 总硬度 | 2–12 | — | dGH |
概述
Phenacogaster tegatus 是体侧有两枚深色斑的小型脂鲤，连同眼睛形成商品名“six-eyed tetra”的由来。它温和，却不等于适合随意放入普通混养缸，伙伴体形和投喂方式需要细致选择。
分布与栖息地
记录来自巴西西南部、巴拉圭境内的巴拉圭河上游，以及阿根廷东北部科连特斯省的巴拉那河。模式产地位于巴西 Jauru 河。
栖境细节不多，影像显示可能偏好较清澈、沉水植物浓密的环境，但这种偏好尚不能视为全面确认。
饲养环境
只要有遮蔽，布景选择较灵活。沙底搭配沉木根枝和水草的自然风格较适合，干落叶可增加隐蔽处，并在分解中形成微生物群。
食性与喂食
天然可能捕食微小无脊椎动物和浮游动物。缸中可接受合口的干粮，但仍应每天给予小活饵或冷冻饵，如丰年虾无节幼体、小型水蚤和微型白虫等，不能因吃干粮就忽视饵料尺寸和种类。
习性与混养
温和，但不算通用社区缸鱼。更适合体型接近的小型脂鲤、合适小型鲶鱼或体型很小且无捕食性的慈鲷，避免伙伴因体形差距而构成压力。
建议八至十条或更多的雌雄混合群，其他群居小鱼可增加安全感，让群体表现更自然。
补充说明
本种侧线不完整，有八至十三枚具孔鳞。横向延长的肩斑在雌雄中都存在，位于背鳍起点稍前方，不能把有无这一斑点直接当作性别判断。
两侧各有两枚暗斑的视觉效果是商品名来源，并不代表拥有额外视觉器官。
图片
图片来自 SeriouslyFish,版权归各摄影者所有。
English
Overview
Two dark spots on each flank, together with the eye, explain the trade name six-eyed tetra for Phenacogaster tegatus. Peaceful behavior does not make it a general-purpose community fish: companion size and suitably small foods require attention.
Distribution & habitat
Records come from the upper Paraguay basin in southwestern Brazil and Paraguay, and from the Paraná in Corrientes, northeastern Argentina. The Jauru River in Brazil is the type locality.
Habitat details are limited. Images suggest relatively clear water with dense submerged vegetation, but that apparent preference is not comprehensively established.
Aquarium setup
Decoration is fairly flexible when shelter is available. Sand, woody roots and branches, and aquatic plants make an appropriate natural arrangement. Dried leaves add cover and support microbial growth as they decompose.
Diet & feeding
Tiny invertebrates and zooplankton are presumed natural prey. Suitable-sized dry food is accepted in captivity, but provide daily small live or frozen foods such as Artemia nauplii, small water fleas, and grindal worms. Acceptance of dry food should not obscure the importance of particle size and variety.
Behaviour & compatibility
Although peaceful, it is not ideal for an indiscriminate community. Similarly sized characins, appropriate small catfishes, and diminutive nonpredatory cichlids are better candidates, with careful attention to size differences.
Keep a mixed-sex group of eight to ten or more. Other small shoaling fishes can provide security and encourage natural group activity.
Notes
An incomplete lateral line contains eight to thirteen pored scales. Both sexes possess an elongated humeral mark just ahead of the dorsal-fin origin, so the presence of that spot is not a sexing character.
The flank marks account for the extra eyes in the trade name; they are pigment patches rather than additional visual organs.
来源
- https://www.seriouslyfish.com/species/phenacogaster-tegatus(抓取于 2026-10-10)
phenacogaster-tegatus · 文件: data/species/phenacogaster-tegatus.md · 状态: 草稿