科: Cyprinidae
菱体鱊为鲤科鱼类，性情平和，需避开爱咬鳍的鱼，原生分布于日本。与亲属一样需要淡水蚌类完成繁殖，没有蚌类时看不到完整繁殖行为。成体约 10.1–14.9 cm，群体越大状态越放松，适宜水温 15–25 °C。饲养不难，难在稳定。
Acheilognathus rhombeus is a Cyprinidae from Japan. In the wild it prefers clear streams and rivers over gravel; in the aquarium it stays peaceful. Plan on 10.1–14.9 cm of adult fish at 15–25 °C. Related profiles: Acheilognathus barbatulus, Acheilognathus cyanostigma, Acheilognathus gracilis.
中等难度，稳定水质比高端设备更关键。Peaceful; males spar gently in breeding dress，Sociable; a larger group spreads any squabbles。
水温控制在 15–25 °C，重点是稳定。Room temperature to heated, depending on origin。
成体约 10.1–14.9 cm；最小缸体 266 L，并留出活动空间。
Omnivore with a taste for vegetable foods and small live fare。建议人工饲料搭配冷冻或活饵，保证多样性。
可以。Peaceful; males spar gently in breeding dress，适合与White-cloud mountain minnows — Share its calm, cool temperament混养。避开Large or boisterous fish — Outcompeted at feeding time。
原生于日本，栖息于Clear streams and rivers over gravel。Moderate, well-oxygenated current，Appreciates well-oxygenated water。
换水与维护期间建议加盖，防止惊跳。
Spawns inside living freshwater mussels; no parental care。Males often slimmer and more colourful。