Description
Half-and-Half is a particularly unusual Koi Tang (Zebrasoma scopas) displaying a striking combination of xanthism and piebaldism. Its distinctive appearance is characterised by contrasting pigmentation across the body, with deep charcoal-grey colouration covering much of the anterior half, transitioning into a pale cream-white posterior. Vivid orange-yellow dorsal and anal fins provide an additional contrast, completing an appearance that is anything but ordinary.
The specimen exhibits two distinct pigmentation characteristics. Xanthism is associated with yellow pigmentation, while piebaldism produces irregular areas of reduced pigmentation, resulting in contrasting patches of colour. Their combination gives Half-and-Half its unmistakable appearance and makes it a particularly interesting example of colour variation within the species.
Beyond its unusual pigmentation, it retains the familiar characteristics of the Yellow Tang, including its active swimming behaviour, grazing habits and suitability for established reef aquariums.
Care Requirements
Requires a mature aquarium with ample swimming space, excellent water quality and stable environmental conditions. Established live rock provides important natural grazing surfaces. Strong circulation and good oxygenation are recommended.
Diet
Primarily herbivorous. Offer a varied diet of marine algae, nori, spirulina-based preparations and quality herbivore formulations. Occasional meaty foods can supplement an otherwise plant-based diet.
Aquarium Compatibility
Generally suitable for reef aquariums and considered reef safe. Can coexist with a wide variety of reef fish and invertebrates. Like other surgeonfish, it may display territorial behaviour towards similarly shaped or closely related species, particularly in smaller aquariums.
Interesting Facts
- Xanthism: A pigmentation condition associated with increased yellow pigmentation.
- Piebaldism: Characterised by irregular areas of reduced pigmentation, producing contrasting light and dark patches.
- Distinctive Colouration: The combination of these pigmentation characteristics creates the striking division of colouration seen in this specimen.
- Species Identity: Despite its unusual appearance, Half-and-Half retains the characteristic anatomy and behaviour of Zebrasoma flavescens.
Specifications
- Scientific Name: Zebrasoma flavescens
- Common Name: Koi Tang / Yellow Tang
- Specimen Name: Half-and-Half
- Colour Morph: Xanthism and piebaldism
- Origin: Central Pacific (species range)
- Adult Size: Approximately 20 cm
- Temperament: Semi-aggressive
- Reef Safe: Yes
- Difficulty: Moderate
