Azure Demoiselle

This tropical marine fish reaches 7 centimetres (2.8 in) in length. It is mostly bright blue in color, with a bright yellow bottom. Different species in this genus have varied amounts of gold coloring.

It is native to the eastern Indian Ocean and western Pacific. It has also recently been filmed in the Mediterranean Sea off Malta. Being a reef species, these fish are found in greatest population in whats known as the Coral triangle, which is one of the largest concentrations of coral reefs in the world, located form the Solomon Islands to Indonesia, Bali and the Philippines. Typically found in waters 1 to 38 m (3 to 125 ft) deep and are non migratory.

The reproduction of Chrysiptera hemicyanea is not well studied. Reproduction in the genus Chrysiptera involves mating pairs, followed by a benthic egg-laying life cycle, where eggs are adhered to a substrate and a male stays around to guard and aerate the eggs. In addition this genus has a shorter larval stage when compared to other damselfish and because of these two things have issues distributing. Population has the ability to double in 15 months.

The generic name, Chrysiptera, is a compound of the Greek words chrysos, meaning "golden" and pteron meaning "fin" or "wing", while the specific name, hemicyanea, means "half blue" referring to the blue head and upper body.