Danio rerio var. Butterfly Fin Blueberry – 3.5–4 inches

Appearance

The Butterfly Fin Blueberry Danio is a visually captivating variant of the common Zebra Danio. It displays a rich blueberry-blue body coloration and elongated, butterfly-style dorsal and caudal fins that elegantly spread like wings when swimming.

Size

• Adult length: Approximately 3.5–4 inches, including the extended fins.

• Overall appearance is larger due to the flowing fin extensions.

Behavior & Social Dynamics

• Active and lively schooling fish—best kept in groups of 6 or more to exhibit natural, dynamic behavior.

• Peaceful temperament, ideal for community aquariums. Due to their long, delicate fins, they should not be housed with fin-nipping species.

Tank Conditions

• Minimum Tank Size: 20 gallons to accommodate active swimming.

• Water Temperature: 72–79°F (22–26°C).

• pH: 6.5–7.5.

• Hardness: Soft to moderately hard.

• Ideal aquarium setup includes open swimming space with gentle flow, interspersed with plants or driftwood for visual contrast and hiding spots.

Diet

• Omnivorous—thrives on a varied diet of high-quality flakes, micro-pellets, and live or frozen foods like brine shrimp and daphnia. A diverse diet helps enhance their vivid blueberry coloration.

Lifespan

• Typically lives 3–5 years with proper care and stable water conditions.