The blue moon danio (Devario xyrops) is a species of cyprinid fish endemic to Myanmar. First described in 2009,[1] they are found in small forested streams on the western slope of the Arakan Mountains in Rakhine State of south-western Myanmar; these streams are typically reduced to a series of interconnected pools during the dry season. This species has also been imported to Europe as aquarium fishes with the code names “TW02” and “Broken Line”.