The Giant Danio earns its name honestly, reaching up to 12 cm and dwarfing the familiar Zebrafish. Found across a broad range of South and Southeast Asian river systems, it inhabits fast-flowing, well-oxygenated streams and rivers. Its body is elongated and torpedo-shaped, decorated with vivid metallic blue and gold horizontal stripes that shimmer brilliantly under good lighting. Males are slimmer and more intensely colored, while females are deeper-bodied, especially when gravid. This is a schooling species at heart and is much more settled and colorful in groups of six or more. Despite its size relative to other danios, the Giant Danio remains wholly peaceful with other fish, though its speed and vigor may intimidate very small or delicate species. It is an energetic top-to-middle swimmer that uses the full volume of a spacious aquarium. The Giant Danio's adaptability to water conditions, readiness to accept all aquarium foods, and robust constitution make it one of the most beginner-friendly larger community fish available. It also has a long history as a research organism and is well understood. A school of Giant Danios adds dramatic movement and vivid color to any aquarium large enough to house them properly.
