Blue-Edge Bitterling (Rhodeus shitaiensis) — Rare Yangtze Stream Gem

The Blue-Edge Bitterling is a rare bit of natural elegance from the Qiupu River, Anhui Province—an exquisite variant of Rhodeus shitaiensis distinguished by shimmering blue edges along its dorsal and anal fins. Males reveal a flash of orange-red on their belly and tail base, creating a serene contrast with the cool fin highlights.

Features & Key Traits:

• Size: Compact, typically up to ~6.2 cm SL 

• Habitat: Endemic to the clear, subtropical streams of Qiupu River in the Yangtze drainage 

• Distinct Appearance: Nuptial males display a reddish-orange belly and caudal area, and deeply blue-edged scales and fins 

• Rarity: Highly uncommon in the aquarium trade, making it a prized addition for discerning collectors.

Care Instructions:

• Tank Setup: A planted aquarium with gentle filtration and soft currents to mirror its natural habitat.

• Water Conditions: Ideal temperature: 18–24 °C (64–75 °F); maintain neutral to slightly alkaline pH; optimize clarity with regular water upkeep.

• Social Behavior: Shoaling species—best kept in groups of 6 or more to encourage healthy coloration and activity levels.

• Breeding: Requires the presence of freshwater mussels; females deposit eggs inside mussel gills, where the young develop safely before emerging