SPOTTED RASBORA | BORARAS MACULATUS

The Spotted Rasbora (Boraras maculatus), also known as the Dwarf Rasbora, is a brilliantly colored and peaceful nano fish that adds subtle beauty and liveliness to planted aquariums. Originating from the soft, acidic blackwater swamps and forest streams of Southeast Asia—particularly Thailand, Malaysia, and Indonesia—this tiny species is prized for its bright reddish-orange body and signature black spot centered on its midsection. When kept in a healthy, well-planted tank, their colors intensify beautifully, glowing like tiny embers as they school together.

Adult Spotted Rasboras are very small, reaching only about 0.75–1 inch (2–2.5 cm) in length, making them one of the smallest tropical fish in the aquarium hobby. Despite their size, they are hardy, social, and thrive when kept in groups of at least 8–10 individuals, where they display natural schooling behavior and feel most secure.

Ideal water parameters:
Temperature: 72–82°F (22–28°C)
pH: 5.5–7.0
Hardness: 2–10 dGH

Tank setup:
Spotted Rasboras thrive in peaceful, heavily planted aquariums with subdued lighting and gentle filtration. Use soft, acidic water and dark substrate to bring out their coloration. Floating plants like Frogbit or Water Lettuce create dappled shade, while fine-leaved plants such as Java Moss or Rotala provide shelter and comfort. A 10-gallon tank or larger is perfect for a small school. They prefer stable conditions and minimal water current.

Diet:
These fish are micro-predators and omnivores. Offer a mix of high-quality micro-pellets, finely crushed flakes, and small frozen or live foods like baby brine shrimp, daphnia, or cyclops. Regular small feedings throughout the day help keep them healthy and vibrant.

Temperament and tankmates:
Spotted Rasboras are extremely peaceful and ideal for nano or community aquariums. They pair wonderfully with other gentle species such as chili rasboras, celestial pearl danios, endlers, ricefish, and dwarf shrimp. Avoid larger or aggressive tankmates that might intimidate or outcompete them.

Breeding:
They are egg scatterers that spawn among fine plants or moss. They do not guard their eggs, so to raise fry successfully, separate adults or use dense vegetation to protect the eggs. Fry can be fed infusoria or powdered fry food once hatched.

In summary, the Spotted Rasbora (Boraras maculatus) is a tiny yet captivating freshwater fish that brings color, activity, and tranquility to any planted aquarium. Its glowing red-orange hue, signature black spot, and calm demeanor make it a perfect choice for aquarists seeking a peaceful, elegant species for nano or nature-style tanks.