Stegastes partitus, commonly known as the Bicolor Damselfish, is a popular choice for marine aquarium enthusiasts due to its vibrant colours and hardy nature. This species is territorial and best suited for intermediate hobbyists who can provide adequate space and compatible tank mates.
Temperament and Compatibility: Stegastes partitus is known for its territorial behaviour, especially as it matures. It can be aggressive towards other damselfish and smaller, more passive species. It is recommended to keep this fish with similarly sized or robust tank mates to minimise stress and aggression.
Diet: This omnivorous species thrives on a varied diet including high-quality marine flakes, pellets, frozen mysis shrimp, brine shrimp, and algae-based foods. Regular feeding 1-2 times daily is ideal to maintain health and vibrant colouration.
Tank Requirements: A minimum tank size of 75 litres (approximately 20 gallons) is recommended to provide sufficient territory and swimming space. The aquarium should have plenty of live rock for hiding and grazing, as well as stable water parameters typical of reef environments.
Reef Compatibility: Stegastes partitus is generally considered Reef Safe with Caution. While it may nip at corals or sessile invertebrates, careful monitoring and adequate space can reduce potential issues.
Care Level: Intermediate. Requires stable water conditions and attention to compatibility due to territorial behaviour.
Lighting and Water Flow: Standard reef lighting and moderate water flow are suitable to replicate natural habitat conditions.
Overall, Stegastes partitus is a striking and engaging species that adds activity and colour to a marine aquarium when cared for properly.



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