Saltwater fish, Batfish, Information, Species

Blue Devil Damselfish : Complete Species & Care Overview

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by Jason Matthews



The Blue Devil Damselfish is a colorful, energetic, durable marine fish popular among novice and intermediate fishkeepers. Unsurprisingly, this fish is popular among enthusiasts, with its striking blue and yellow colors and lively disposition. 

This article will dig into every aspect of this species, from its origin and appearance to tank conditions, food, breeding, and more. Whether new to fishkeeping or looking to add a new species to your collection, the Blue Devil Damselfish will captivate you with its unique beauty and charm. So sit back, relax, and prepare to discover everything there is to know about this beautiful fish species.


Scientific Name: Chrysiptera taupou
Common Names: Blue Devil Damselfish
Life Expectancy: 5-8 years
Adult Size: Up to 4 inches (10 cm) in length


HabitatCoral reefs in the Pacific and Indian Oceans
OriginIndo-Pacific region
Care LevelModerate
Tank LevelMiddle
Minimum Tank Size30 gallons (113 liters)
Water pH8.1-8.4
Water Temperature72-78°F (22-26°C)
Water Hardness8-12 dKH
Tank MatesCompatible with other peaceful or semi-aggressive species
avoid keeping with other damselfish species

Fun Fact Corner

A fun fact about the Blue Devil Damselfish is that they are known for their territorial behavior and bold personalities. They will fiercely defend their territories in the wild, even against much larger fish species. This behavior can make them an entertaining addition to a home aquarium, as they often interact with their tank mates and owners. 


The Blue Devil Damselfish, also known as Chrysiptera taupou, is found in tropical Pacific Ocean environments such as the Great Barrier Reef, Indonesia, and the Philippines. This species prefers shallow lagoons and coral reefs where it can hide among the coral and rocks. The Blue Devil Damselfish is a resilient species that can adapt to various environments, making it a popular choice for home aquariums.

 It is important to note that collecting this species in the wild is not recommended because over-collection might negatively influence wild populations. Getting captive-bred individuals from a reputable breeder or pet store is preferable. 

Appearance & Size

The Blue Devil Damselfish gets its name from its eye-catching blue and yellow appearance, which makes it a great addition to any aquarium. It has a blue body with a golden tail and fins. Its coloring can strengthen or vary according to its mood or circumstances. Juvenile Blue Devil Damselfish are often darker than adults, beginning with a brown or green base color and progressively turning bluer as they age.

The Blue Devil Damselfish is a small fish species growing to a maximum length of 3 inches when fully mature. It is important to remember that the Blue Devil Damselfish, like other fish, will grow to match its surroundings. 


The Blue Devil Damselfish is a monoecious species, which means that male and female individuals are present in the same population. However, differentiating between male and female persons can be challenging due to the lack of external physical traits specific to each gender. 

According to some research, males may be slightly larger and more aggressive than females, but these differences are not always constant. They may be due to environmental variables or individual variance. 

Fish keepers generally do not need to distinguish between male and female Blue Devil Damselfish because this species is resilient and adaptable and can thrive in various environments.


The Blue Devil Damselfish is known for its lively and active behavior, which can make it an entertaining addition to any aquarium. This species is generally regarded as gentle, although it can become aggressive toward other fish if it feels threatened or is defending its area. 

Blue Devil Damselfish are also known for being daring and curious, frequently approaching divers and other huge things in their surroundings. This species will often form a territory in an aquarium, such as a cave or a specific portion of the tank, which will protect against other fish.


When selecting tankmates for the Blue Devil Damselfish, it is important to consider the species’ territorial behavior. This species can become aggressive towards other fish, especially if they are similar in size and shape. It is best to keep the Blue Devil Damselfish in a community aquarium with other peaceful fish that are larger or have a different body shape.

Here are some good tankmates for the Blue Devil Damselfish:

  • Angelfish
  • Clownfish
  • Tangs
  • Triggerfish
  • Gobies
  • Large wrasses

Tank conditions

The Blue Devil Damselfish is a tough species that can adapt to various water conditions. This species prefers a well-established aquarium with consistent water parameters, such as a pH of 8.1-8.4, a water hardness of 8-12 dKH, and a temperature range of 72-78°F (22-26°C). 

To keep the tank clean and healthy, it is also necessary to maintain a proper filtration system and make regular water changes. Blue Devil Damselfish are territorial. Giving plenty of hiding places and territory alternatives like rocks, caves, and other structures is important. This species also loves a well-planted aquarium because it can provide more hiding spots and increase water quality. 


The Blue Devil Damselfish is an omnivore and requires a varied diet in the aquarium. This species feeds on small crustaceans, algae, and zooplankton in the wild. Giving a balanced diet that includes both vegetable and protein-based items in captivity is important.

Some good Blue Devil Damselfish food alternatives include:

  • Small pellet or flake food
  • Frozen or freeze-dried mysis shrimp
  • Frozen or freeze-dried brine shrimp
  • Fresh or frozen vegetables such as spinach or peas
  • Algae wafers

It is important to remember that overfeeding can lead to water quality issues, so feed the fish small amounts multiple times a day instead of a large amount once a day.


Breeding the Blue Devil Damselfish in an aquarium environment can be challenging, but it can be accomplished with proper conditions and patience. These fish are oviparous, which means they lay eggs, and the male will ferociously protect the eggs and fry once they hatch.

A separate breeding tank with similar water conditions to the main tank is recommended to be used for breeding the Blue Devil Damselfish. The breeding tank should have plenty of hiding spots for the female to retreat to if necessary and a shallow sandy bottom for the eggs to be laid on. 

The temperature of the water should be slightly higher, and the pH should be between 8.0 and 8.4. A varied diet, including live or frozen food, is also important to encourage breeding behavior and fish health. Once the eggs have been placed and fertilized, the male will protect them and the fry until they can swim freely. They can now be transferred to a separate grow-out tank or raised in the breeding tank.


As with any aquarium species, it is important to be aware of various diseases to which the Blue Devil Damselfish may be susceptible. Parasitic, bacterial, and fungal infections are the most prevalent conditions affecting these fish.

Maintaining good water quality, providing a variety of feed, and routinely observing the fish for signs of sickness, such as changes in color, appetite, or behavior, are important. If any signs of illness are observed, it is important to take action promptly and seek the advice of a veterinarian or aquatic specialist.

Preventative measures such as regular water changes, using a high-quality filtration system, and avoiding overstocking the tank can help reduce the risk of disease in the Blue Devil Damselfish.


Jason Matthews

My name is Jason Matthews, and welcome to my website. When other kids were bragging about how their dog could sit and roll over, I was bragging about my latest Betta Fish and the cool sea castle I just added to his aquarium. 

Jason aquariume

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