Is this species suitable for beginners?

Yes — it's hardy and tolerant of changing water conditions, making it a good choice for those new to marine fishkeeping. With basic water maintenance and regular feeding, it tends to be relatively easy to keep stable.

Can it be kept with other fish?

It's one of the calmer damselfish, though it still shows some territorial behavior. Choosing similarly sized, peaceful tankmates and giving it enough space and hiding spots helps it mix well in a community tank.

Can multiple individuals be kept together?

Yes, in a sufficiently spacious tank you can keep several together as a group. In a smaller tank, though, more individuals can lead to more territorial disputes, so adjust the number to match your tank size.

How large does it grow?

It's a small species that reaches a maximum of about 7 cm even as an adult. Because it stays compact, it's manageable even in smaller tank setups.

Are there any legal restrictions on keeping it?

The Royal Damsel (Azure Damselfish) is not subject to CITES. You can consider keeping one without concern on that front.

Azure Damselfish

The Royal Damsel (Azure Damselfish) is a small damselfish with a vivid blue body that shades into yellow from the belly through the anal and tail fins. It's hardy and tolerant of fluctuating water conditions, making it a great choice for beginners setting up their first marine aquarium. Compared to other damselfish, it's relatively even-tempered, and in a sufficiently spacious tank it can even be kept in small groups. Reaching a maximum size of about 7 cm, it stays compact while still bringing striking color to any marine setup.

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About Azure Damselfish

The Royal Damsel (Azure Damselfish) is a hardy, beginner-friendly damselfish with striking blue and yellow coloring, reaching about 7 cm. Learn key care tips and FAQs here.

7 things to know before welcoming a Azure Damselfish

1Hardy and Adaptable
It's tolerant of water quality fluctuations and settles in well even in a newly cycled tank. Still, being hardy doesn't mean basic maintenance like regular water changes can be skipped — sudden water quality drops require the same caution as with any fish.
2Relatively Calm Temperament
Many damselfish are known for aggressive behavior, but the Royal Damsel is considered one of the calmer members of the family. That said, it still shows some territoriality, so it's worth choosing similarly small, peaceful tankmates.
3Group Keeping Depends on Tank Size
In a sufficiently spacious tank, it's possible to keep several individuals together. However, in a smaller tank, more fish means more territorial disputes, so match the number of fish to your tank's size.
4Stays Small — Up to 7 cm
This is a small species that reaches a maximum of about 7 cm even as an adult. Because it doesn't grow very large, it's easier to balance within your tank's layout alongside corals.
5Blue and Yellow Coloring
Its most striking feature is the contrast between the vivid blue covering most of the body and the yellow that spreads from the belly through the anal and tail fins. This coloring is a big part of its popularity as an ornamental fish.
6A Good Beginner Species
Thanks to its hardiness and adaptability, it's often chosen by people just starting out in marine aquariums. It still helps to know the basics of feeding and settling-in care before bringing one home.
7Prepare Your Tank First
Before bringing one home, make sure your tank's water quality and temperature are stable. It may hide right after being introduced to a new environment, so take feeding slowly and watch its behavior rather than rushing.

Frequently asked questions about Azure Damselfish

Q.Is this species suitable for beginners?: A.Yes — it's hardy and tolerant of changing water conditions, making it a good choice for those new to marine fishkeeping. With basic water maintenance and regular feeding, it tends to be relatively easy to keep stable.
Q.Can it be kept with other fish?: A.It's one of the calmer damselfish, though it still shows some territorial behavior. Choosing similarly sized, peaceful tankmates and giving it enough space and hiding spots helps it mix well in a community tank.
Q.Can multiple individuals be kept together?: A.Yes, in a sufficiently spacious tank you can keep several together as a group. In a smaller tank, though, more individuals can lead to more territorial disputes, so adjust the number to match your tank size.
Q.How large does it grow?: A.It's a small species that reaches a maximum of about 7 cm even as an adult. Because it stays compact, it's manageable even in smaller tank setups.
Q.Are there any legal restrictions on keeping it?: A.The Royal Damsel (Azure Damselfish) is not subject to CITES. You can consider keeping one without concern on that front.

Useful tools for Azure Damselfish care

💧Aquarium Volume CalculatorCalculate water volume, weight, and heater wattage from tank dimensions 🧪Water Quality CheckerFind compatible fish, shrimp, plants & corals based on pH, temperature & hardness 🍽️Feeding GuideCheck feeding frequency, portion sizes & supplements by species and growth stage 🤝Compatibility CheckerCheck compatibility between two species on a 5-level scale 📊Fish Compatibility MatrixCheck fish compatibility at a glance with our matrix chart 🔄Nitrogen Cycle GuideAuto-calculate bacteria colonization timeline for new tank cycling 🗓️Seasonal Care CalendarMonthly care events and seasonal management tips at a glance 🚿Water Change CalculatorAuto-calculate optimal water change frequency and volume by tank size and fish count 🐠Stocking CalculatorCalculate max fish capacity for your tank size with overstocking alerts 🏞️Tank Layout PlannerGet substrate, plant & hardscape suggestions based on tank size and style 🧮Care Cost SimulatorEstimate initial, monthly & annual costs by category, care level and quantity ⚖️Species Comparison ToolCompare two species side by side: care difficulty, size, lifespan & temperature 🎯Pet Match DiagnosticAnswer 7 questions to find your top 3 perfect pets 🚚Transport Safety CheckerCheck transport safety score and precautions by category, season, method and distance ⏱️Quarantine & Acclimation TimerManage quarantine periods and acclimation steps with countdown timers. Includes recommended durations by species

Learn more about Azure Damselfish in the encyclopedia

View Azure Damselfish encyclopedia entry →

Care difficulty, lifespan, size and diet — all basics covered.

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