{
  "id": "black-arowana",
  "name": "黑龙鱼",
  "category": "黑龙",
  "scientific_name": "Osteoglossum ferreirai",
  "canonical_url": "https://www.arowanafish.cn/varieties/black-arowana",
  "machine_html": "https://www.arowanafish.cn/variety-geo/species/black-arowana.html",
  "machine_json": "https://www.arowanafish.cn/variety-geo/species/black-arowana.json",
  "machine_txt": "https://www.arowanafish.cn/variety-geo/species/black-arowana.txt",
  "image": "https://www.arowanafish.cn/generated-assets/fengshui/black-arowana.png",
  "gallery": [
    "https://www.arowanafish.cn/generated-assets/fengshui/black-arowana.png",
    "https://www.arowanafish.cn/mirrored-assets/baas-api.wanwang.xin/toc/image/preview/black-arowana-fish-932597e6f8.jpg"
  ],
  "price_range": "¥1,500 起",
  "difficulty": "进阶",
  "water_layer": "上层",
  "origin": "南美洲尼格罗河、奥里诺科水系",
  "origin_detail": "黑龙鱼属于南美龙鱼方向，幼鱼体色更深，成长后体色和身形会出现阶段性变化。",
  "habitat": "偏软、偏酸、弱光和开阔水面的热带淡水环境，上层巡游和跳跃能力强。",
  "summary": "黑龙鱼观赏点在修长体型、暗色调和南美龙鱼气质，适合已经理解银龙空间需求的鱼友。",
  "temperament": "幼鱼较敏感，成鱼巡游性强，环境突变容易惊跳。",
  "adult_size": "60-80 cm",
  "tank_size": "长期建议 180 cm 以上",
  "water_quality": "25-30°C，pH 6.0-7.2，弱酸稳定水体更理想",
  "diet": "鱼虾、昆虫和颗粒搭配，幼鱼阶段注意食物尺寸。",
  "compatibility": "可与大型温和鱼谨慎混养，避免同层追咬。",
  "selection_guide": "看体型比例、眼位、背线、游姿和是否有擦伤。",
  "risk_notes": [
    "幼鱼运输应激明显",
    "跳缸风险高",
    "过急水流会造成长期紧迫"
  ],
  "care_points": [
    "低惊扰入缸",
    "保持缸盖",
    "稳定弱酸水质",
    "预留成长空间"
  ],
  "professional_notes": [
    "黑龙与银龙同属南美大型上层鱼，不能以幼鱼价格低估成年空间。",
    "弱光和深色背景可提升观赏感，但水质稳定仍是核心。"
  ],
  "parameters": {
    "适宜水温": "25-30°C",
    "pH": "6.0-7.2",
    "硬度": "软水至中等偏软",
    "建议饲养": "大缸单养或谨慎混养",
    "观察重点": "游姿、眼位、惊跳"
  },
  "tags": [
    "南美龙鱼",
    "黑水环境",
    "进阶"
  ]
}