Neon damselfish
Pomacentrus coelestis
A vibrantly colored electric blue damselfish known for its extreme hardiness and high activity levels. Despite its beauty, it is fiercely territorial and needs careful pairing with robust tankmates.
Wassertemperatur
24 - 28 °C
pH-Wert
8.1 - 8.4
Wassertyp
Meerwasser
Tankfüllstand
Unten und in der Mitte
Erwachsenengröße
9 cm
Mindesttankvolumen
>= 100 L
Mindestgruppe
>= 1
Artbeschreibung
Geographical Origin and Habitat: Pomacentrus coelestis, the neon damselfish, is widely distributed throughout the tropical waters of the Indo-Pacific region, from the eastern coast of Africa to Polynesia, and from southern Japan to Australia. It inhabits shallow lagoons, outer reef slopes, and rocky reefs exposed to moderate currents at depths between 1 and 20 meters, often found near coral rubble.
Taxonomy and Morphology: A member of the Pomacentridae family, this fish has an oval-shaped, laterally compressed body characteristic of damselfishes. It grows to a maximum size of approximately 8 to 9 centimeters (3 to 3.5 inches). The mouth is small and terminal, suited for picking zooplankton from the water column.
Social Behavior: Like most damselfishes, it is highly territorial and aggressive, particularly as it matures. It will aggressively defend its chosen territory against tankmates of any size. While they may live in loose groups in the wild, in the confines of an aquarium, intense intraspecific aggression usually occurs.
Coloration and Sexual Dimorphism: It is famous for its stunning, metallic electric blue body coloration. Depending on the geographical location, the anal fin and the lower portion of the tail fin may vary from translucent to pale yellow. There is no visible sexual dimorphism; males and females look identical externally.
Pflege, Zucht und Mitbewohner
Aquarium Setup: A minimum tank volume of 30 gallons (100 liters) is recommended for a single specimen. If keeping a group, a much larger tank (at least 75 gallons / 280 liters) with a complex aquascape of live rock is required to provide territories and visual barriers to reduce fighting.
Diet and Feeding: This species is an omnivore and a very eager eater. It readily accepts a wide variety of aquarium foods, including high-quality dry flakes, pellets, frozen mysis shrimp, brine shrimp, and plankton. Providing some vegetable matter, such as spirulina flakes, is beneficial for its health.
Water Quality: It is an exceptionally hardy species that can tolerate minor fluctuations in water chemistry. Keep water temperature between 24 and 28 °C (75 to 82 °F), pH at 8.1 to 8.4, and specific gravity at 1.020 to 1.025. Standard mechanical and biological filtration is sufficient.
Compatibility and Cohabitation: It is reef-safe and does not pose a threat to corals or invertebrates. However, due to its aggression, it should not be housed with peaceful or slow-moving fish. Good tankmates include larger, robust, and semi-aggressive species like tangs, wrasses, and hawkfish.
Aquarium Breeding: Breeding in captivity is possible. The male and female will clean a flat rock surface where the adhesive eggs are laid. The male then guards and aerates the nest until hatching. Rearing the fry requires micro-foods like rotifers and intensive care.
Risks and Diseases: While highly resistant to common marine diseases like Cryptocaryon, the primary risk in captivity is physical damage from territorial conflicts. Fighting can lead to torn fins and open wounds, which can become infected if the water quality is poor.
Geografische Herkunft und Verbreitung
Pomacentrus coelestis, the neon damselfish, is widely distributed throughout the tropical waters of the Indo-Pacific region, from the eastern coast of Africa to Polynesia, and from southern Japan to Australia. It inhabits shallow lagoons, outer reef slopes, and rocky reefs exposed to moderate currents at depths between 1 and 20 meters, often found near coral rubble.
Ursprung
Tropische Ozeane und RiffeAfrika und MadagaskarOstasienAustralien, Neuguinea und Ozeanien
Fischprofil
- Temperament
- Aggressive
- Like many damselfish, the Pomacentrus coelestis possesses a bold and sometimes pugnacious temperament. While less aggressive than some notorious damsel species, they are fiercely territorial of their chosen nesting or hiding spots. They are known to assert themselves even against larger fish if their space is threatened. To maintain a peaceful community, they should be housed with fish of similar temperament or larger size. Careful planning of tank additions and ample rockwork can help manage their feisty nature.
- Diät
- Omnivore
- The Pomacentrus coelestis is an omnivore in the wild, grazing on benthic algae and consuming tiny invertebrates. In a captive environment, they are eager eaters that will accept almost any aquarium fare offered. Providing a balanced diet of meaty foods like mysis and brine shrimp, alongside high-quality herbivore preparations or spirulina flakes, is essential. Regular varied feedings ensure they receive the full spectrum of nutrition required for vibrant colors and strong immunity. Their robust appetite makes them very easy to feed in most setups.
- Lebenserwartung
- 5-8 years
- Erwachsenengröße
- 9 cm
- Geschlechterverhältnis
- Harem
- Sexing the Pomacentrus coelestis is extremely difficult for the average aquarist, as there are no prominent physical differences between the genders. They are generally not sexually dimorphic, though males may exhibit slightly more intense coloration during courtship. In the home aquarium, keeping a small group can eventually lead to pair formation, but it may also result in significant territorial disputes. For most setups, it is often safer to keep a single specimen to avoid conspecific aggression. Understanding their sex is largely unnecessary unless a dedicated breeding project is planned.
- Fütterungsfrequenz
- Twice daily
- Due to their active swimming and continuous foraging behavior, the Pomacentrus coelestis benefits from being fed multiple times a day. Offering two to three small meals daily is preferred over a single large feeding. This routine helps reduce aggression, as a well-fed damselfish is generally less territorial. It also ensures that other, slower-eating tank mates have a fair chance to consume their share. Careful portion control during these frequent feedings prevents the accumulation of excess detritus.
- Bioload
- Low to Medium
- The Pomacentrus coelestis has a relatively moderate bioload considering its small size, primarily due to its energetic lifestyle. They consume food enthusiastically and consequently produce a steady amount of waste in the aquarium. Ensuring efficient mechanical and biological filtration is necessary to keep water parameters stable. Regular partial water changes will help export dissolved organics efficiently. An appropriately sized protein skimmer is beneficial for maintaining the high water quality they thrive in.
- Fluss
- Strong
- The Pomacentrus coelestis prefers areas with moderate to strong water movement, typical of the reef habitats they originate from. Good flow encourages them to stay active and mimics the natural currents that deliver food particles. Strong circulation also helps keep the water well-oxygenated, which is vital for their fast metabolism. They often dart in and out of the current while exploring the rockwork. Ensuring there are also slightly calmer areas allows them to rest when necessary.
- Sprungrisiko
- No
- Reproduktion
- Oviparous
- Breeding the Pomacentrus coelestis in captivity is relatively straightforward in terms of spawning, as they frequently lay eggs in established aquariums. The male typically selects a crevice or a flat surface, cleans it thoroughly, and courts the female. Once eggs are laid, the male becomes highly aggressive, vigorously defending the clutch from any perceived threats until they hatch. However, the subsequent rearing of the minuscule, pelagic fry is immensely difficult. It requires specialized rearing tanks, rotifers, and expert dedication to achieve success.
- Kompatibilität & Tankkameraden
- Aggressive
- When it comes to compatibility, the Pomacentrus coelestis can be somewhat territorial, particularly as they establish a designated home within the rockwork. While they are reef safe and will not harm corals, they may chase away smaller or similarly sized fish that encroach on their territory. They are best housed with moderately aggressive to robust peaceful community fish that can hold their own. Keeping them with shy, easily intimidated species is generally discouraged to prevent undue stress. Adding them as one of the last fish in a tank can help mitigate aggressive territorial behaviors.
- Tankfüllstand
- Middle/Bottom
- The Pomacentrus coelestis tends to occupy the lower to middle sections of the aquarium, closely associating with the rockwork. They require an intricate aquascape with numerous caves, overhangs, and hiding places to feel secure. They will quickly claim a specific crevice or hole as their primary residence and defend the immediate area. Providing ample live rock allows them to exhibit natural foraging behaviors and territorial displays. While they stay near the rocks, they will venture out to feed and interact.
Wissenschaftliche Modelle & Parameter
FishBase
Zugang zu den offiziellen wissenschaftlichen Daten der Art
FishBase v25.04Daten synchronisiert am: 15.06.2026
- Trophäenniveau
- 3,2 ± 0,28 se
- Belastbarkeit
- Hoch (weniger als 15 Monate)
- Phylogenetische Einzigartigkeit (PD50)
- 0.5
- Bayessche Längen-Gewichts-Beziehung
- a = 0.01413, b = 2.95
- AnfälligkeitGeringe Anfälligkeit (10 / 100)
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