Zebrafish
Danio rerio
Zebrafish (Danio rerio) is a freshwater species with an adult-size reference of about 5 cm. It needs at least 80 litres and 8 individuals, with its social and territorial profile taken into account.
Wassertemperatur
18 - 25 °C
pH-Wert
6.5 - 7.5
Wassertyp
Süßwasser
Tankfüllstand
Oberfläche und Mitte
Erwachsenengröße
5 cm
Mindesttankvolumen
>= 80 L
Mindestgruppe
>= 8
GH
5 - 15 dGH
KH
2 - 12 dKH
TDS
95 - 345 ppm
Leitfähigkeit
148 - 539 uS/cm
Artbeschreibung
Geographical Origin and Habitat: A freshwater species; the enclosure should provide stability, oxygenation, space and shelter consistent with its behaviour without turning one habitat description into a mandatory recipe.
Taxonomy and Morphology: The accepted scientific name is Danio rerio; the verified classification records genus Danio, family Danionidae, subfamily Danioninae, order Cypriniformes. Historical names remain searchable as synonyms rather than separate species.
Social Behavior: Zebrafish is gregarious and should be kept in a school. The minimum reference is 8 individuals; sex, maturity and available space can require a more conservative composition. Observe access to food, resting behaviour, chasing and use of shelter. Isolation, persistent competition or aggression means the number, composition or environment needs to be corrected.
Coloration and Sexual Dimorphism: Colour and shape can vary with age, sex, physiological state and environmental conditions. Identification and sexing require recognized species-level characters; one appearance or photograph is not enough.
Pflege, Zucht und Mitbewohner
Aquarium Setup: Zebrafish needs an aquarium of at least 80 litres, sized for adult body size and a minimum group of 8 individuals. Filtration, shelter and swimming room must match the species and the actual number kept. Volume alone does not make an enclosure suitable: tank shape and length, usable area, oxygenation and the ability to separate territories must reflect adult behaviour.
Diet and Feeding: The recorded diet is omnivorous. Offer appropriately sized foods varied within that category, and adjust quantity and frequency from actual intake, body condition and leftovers. One food or a fixed schedule is not suitable for every age and situation.
Water Quality: Maintain stable, well-oxygenated water appropriate to a freshwater species; the card's reference values are 18–25 °C, pH 6.5–7.5. Verify conditions with reliable tests and size maintenance and filtration to the actual load. Ranges are not automatic thresholds for treatment or rapid chemical correction.
Compatibility and Cohabitation: The cohabitation profile is suitable for a compatible community, with a generally active temperament. Keep at least 8 individuals; tankmates, stocking density and decor must allow escape, rest and feeding without excessive competition. Watch interactions especially during feeding, maturity and breeding. Persistent chasing, injury or exclusion from food requires a change in stocking or layout, or separation of the animals.
Aquarium Breeding: The recorded reproductive profile is “egg scattering”. Breeding should be attempted only with healthy adults, separation capacity and a plan for eggs or young. Do not treat unverified triggers, sex ratios or hatch times as universal for this species.
Risks and Diseases: Use a secure cover and close escape gaps. Prevent problems through quarantine of new arrivals, stable water, appropriate feeding and daily observation. Similar signs can have different causes, so check parameters, history and diagnosis before medication. Follow the product label and qualified aquatic-veterinary advice; there is no universal reduced dose for a species or family.
Geografische Herkunft und Verbreitung
A freshwater species; the enclosure should provide stability, oxygenation, space and shelter consistent with its behaviour without turning one habitat description into a mandatory recipe.
Ursprung
Süd- und Südostasien
Fischprofil
- Temperament
- Active
- Zebrafish has a generally active temperament. Insufficient space, an unsuitable social ratio or incompatible tankmates can substantially change observed behaviour.
- Diät
- Omnivore
- As omnivorous micro-predators in the wild, Zebrafish readily accept a wide variety of foods in the home aquarium. Their diet should consist of a high-quality flake or micro-pellet as a staple, supplemented regularly with live or frozen foods such as daphnia, brine shrimp, and bloodworms. Providing a varied diet ensures optimal health, vibrant coloration, and a robust immune system.
- Lebenserwartung
- 3-5 years
- Erwachsenengröße
- 5 cm
- Geschlechterverhältnis
- School
- Zebrafish is gregarious and should be kept in a school. The reference minimum is 8 individuals and must not be read as permission to overcrowd the aquarium.
- Fütterungsfrequenz
- Twice daily
- Due to their high energy levels and rapid metabolism, these active swimmers benefit from being fed small amounts of food two to three times per day. It is important to only offer what they can completely consume within a couple of minutes to prevent water quality issues from uneaten food. Fasting them for one day a week can also help clear their digestive tracts and prevent constipation.
- Bioload
- Low
- Zebrafish have a relatively low individual bioload, but because they are highly active schooling fish, they must be kept in groups of at least six to eight individuals. When calculating the total bioload for an aquarium, it is essential to factor in the size of the entire school rather than just a single fish. Regular water changes and adequate filtration are generally sufficient to handle their waste output effectively.
- Fluss
- Strong
- Hailing from streams and slow-moving rivers in South Asia, Zebrafish appreciate well-oxygenated water with a moderate to strong current. They can frequently be observed swimming directly into the flow of the filter output, which mimics their natural habitat and provides them with necessary exercise. Using a powerhead or a strong canister filter can help recreate this preferred environment.
- Sprungrisiko
- Yes
- Zebrafish are notorious jumpers and are incredibly adept at finding even the smallest gaps in an aquarium lid to escape through. A tight-fitting lid or a heavy glass canopy is an absolute necessity to prevent them from jumping out of the tank, especially when they are newly introduced or startled. Care must be taken to cover any openings around filter pipes or heater cables securely.
- Reproduktion
- Egg scatterer
- They are prolific egg scatterers and will frequently spawn in the home aquarium, often in the early morning shortly after the lights come on. However, they exhibit no parental care and will eagerly consume their own eggs if given the opportunity. To successfully raise fry, a separate breeding tank with a mesh bottom or dense spawning mops is required to protect the eggs from the adult fish.
- Kompatibilität & Tankkameraden
- Community
- The cohabitation profile is suitable for a compatible community, with a generally active temperament. Keep at least 8 individuals; tankmates, stocking density and decor must allow escape, rest and feeding without excessive competition. Watch interactions especially during feeding, maturity and breeding. Persistent chasing, injury or exclusion from food requires a change in stocking or layout, or separation of the animals.
- Tankfüllstand
- Top/Middle
- These highly energetic fish predominantly occupy the top and middle levels of the water column, where they spend most of their time darting about. They are surface feeders by nature and will eagerly rise to the top of the tank during feeding times to grab flakes or insects. Although they explore all areas of the tank, their strong preference is for the upper strata.
Wissenschaftliche Modelle & Parameter
FishBase
Zugang zu den offiziellen wissenschaftlichen Daten der Art
FishBase v25.04Daten synchronisiert am: 15.06.2026
- Trophäenniveau
- 3,1 ± 0,1 se
- Belastbarkeit
- Hoch (weniger als 15 Monate)
- Phylogenetische Einzigartigkeit (PD50)
- 0.5
- Bayessche Längen-Gewichts-Beziehung
- a = 0.00977, b = 3.04
- AnfälligkeitGeringe Anfälligkeit (11 / 100)
Bildergalerie
Lizenzierte Bilder, die mit der Art oder, wenn markiert, mit dem nächstgelegenen repräsentativen Taxon verknüpft sind.
Verwandte Arten
Empfehlungen gruppiert nach nahen Verwandten, Auswahl von Begleitern und ähnlicher Betreuung.
