Rainbowfish are active swimmers that often school near the surface of the aquarium. Depending on the species, their size can vary significantly — from the delicate Pseudomugil species such as Threadfin and Forktail Rainbows that grow to around 1.5 inches, to the larger Melanotaenia varieties such as Boesemani and Turquoise Rainbows that can reach 4 inches in length.

Every species of Rainbowfish thrives in community aquariums and does well with other peaceful fish such as Tetras, Rasboras, and Corydoras. Their gentle nature, combined with their stunning coloration, makes them one of the most rewarding fish families to keep.

Why Choose Rainbowfish?

• Bright, iridescent colors that shimmer under aquarium lighting
• Peaceful temperament ideal for community tanks
• Hardy and adaptable to a wide range of freshwater conditions
• Constant schooling behavior that adds life and movement

Care Tips for Rainbowfish

• Provide a tank of 20 gallons or larger with plenty of swimming space
• Maintain clean water with moderate flow and temperatures of 74–80°F
• Feed a varied diet of quality flakes, small pellets, and frozen or live foods for best coloration
• Keep in groups of six or more to encourage natural schooling behavior

Popular Rainbowfish Species We Offer

• Boesemani Rainbowfish (Melanotaenia boesemani) – striking blue and orange coloration
• Turquoise Rainbowfish (Melanotaenia lacustris) – shimmering metallic turquoise hue
• Threadfin Rainbowfish (Iriatherina werneri) – delicate fins and peaceful nature
• Forktail Rainbowfish (Pseudomugil furcatus) – small, active swimmer perfect for nano tanks
• Neon Dwarf Rainbowfish (Melanotaenia praecox) – bright, compact species for community setups

Whether you prefer the dazzling Boesemani or the elegant Threadfin, Rainbowfish bring unmatched energy and brilliance to any freshwater setup. With proper care and good company, they’ll reward you with years of color and activity.

Rainbowfish FAQs