Harlequin Rasbora (Trigonostigma heteromorpha) is a small freshwater fish from Southeast Asia. They are from the streams of Singapore, Malaysia, and Thailand. The one from Sumatra island, Indonesia refers to another species. Harlequin Rasboras are a great shoaling fish to add to your community tank. Harlequin Rasbora is the most popular of over 60 species […]