Azure Damselfish (Chrysiptera hemicyanea)
The Azure Damselfish, also known as the Half-blue Damselfish, is a two-tone marine fish with a bright blue front portion and yellow posterior, including the anal fin and tail. The amount of yellow on the body varies by individual. While some refer to C. parasema as the Azure Damselfish, in the aquarium trade, this species is recognized as C. hemicyanea.
Live Aquaria Care Requirements
Requires a 30-gallon aquarium or larger with ample rockwork and decor. Tolerates substandard water parameters, making it suitable for beginner marine aquarium keepers. Juvenile Azure Damsels add vibrant color and movement to a tank when kept in small groups.
| Parameter | Requirement |
|---|---|
| Water Temperature | 72°F to 78°F |
| Water pH | 8.1 to 8.4 |
| Water Hardness | 8 to 12 dGH |
| Compatibility | Best with semi-aggressive or non-aggressive marine species |
FAQ
What is the difference between Azure Damselfish and C. parasema?
In the aquarium trade, Azure Damselfish refers to Chrysiptera hemicyanea, not C. parasema. While C. parasema is sometimes called Azure Damselfish, the correct species for this name is C. hemicyanea.
How big does an Azure Damselfish grow?
Please contact customer service
Is the Azure Damselfish aggressive toward other fish?
It is semi-aggressive and best kept in groups with non-aggressive or similarly sized marine fish.

Blake Springer –
Added a small group of Azure Damselfish to my 40-gallon tank. They are very active and bring a lot of color. Easy to care for even as a beginner. The blue and yellow coloring stands out well against the rockwork.
Audrey North –
They’ve been in my tank for three months. The fish are healthy and seem to thrive in the current water conditions. I appreciate how tolerant they are of fluctuating parameters.
Gabrielle Dyer –
Great addition to a marine setup. The fish are lively and don’t cause any issues with other species. I’ve kept them with clownfish and they coexist peacefully.