Cottidae species Cottus pollux comes from Japan. A benthic percher that spends its days darting between rock, glass and cave — structure decides its temperament. It swims in mid-water. Adults reach 4–8 cm. Pairs or small groups with ample hiding spots. Caves, stable pairs and clean sand keep this fish far calmer than open, bare tanks ever will. Maintain 20–26 °C at pH 6.5–7.5. Undemanding once its core needs are met.
原生環境
生息地
Warm freshwater streams and lakes
水流
Still to gentle current
溶存酸素
Moderate oxygen levels
レイアウトと設備
底床
Fine sand and gravel
流木・石組
Driftwood and smooth stones
水草
Hardy common aquarium plants
性格・餌・混泳
群泳性
Pairs or small groups with ample hiding spots
餌
Predatory bottom-picker; offer varied small fare
おすすめの混泳相手
Non-goby bottom fish — Ignore its territorial posturing
混泳しないほうがいい相手
Large aggressive fish — Shatter its sense of cover
繁殖と注意点
雌雄の違い
Subtle external differences
繁殖方法
Lays eggs in a sheltered cavity; males fan and guard