Bicolour Parrotfish (Bolbometopon) M 80-90 cm

Overview

The Bicolour parrotfish is a truly exceptional marine fish for the experienced aquarist looking for a statement species with serious space requirements. This large, reef-associated parrotfish is known for its powerful beak-like teeth, bold swimming behaviour and striking appearance as it matures. Offered here in size M at approximately 80-90 cm, it is a fish for dedicated public-display style systems, not standard home aquariums.

Parrotfish are fascinating grazers that play an important ecological role in the wild, feeding on algae and the material growing on hard surfaces. Because of their size, feeding style and constant activity, they need a very large, mature marine setup with excellent filtration, stable water chemistry and plenty of open swimming room. They are best kept by advanced marine keepers who understand the demands of large tropical saltwater fish.

At Tropical Fish Co, we carefully source and acclimate marine livestock to help ensure strong condition on arrival. This species is covered by our live arrival guarantee, and we offer fast UK delivery for safe, efficient shipment. Please note that due to the adult size and feeding behaviour of this fish, it is only suitable for specialist systems with appropriate planning.

Care at a Glance

Origin & Natural Habitat

Parrotfish are found across tropical Indo-Pacific reef environments, where they inhabit coral reefs, lagoon edges and outer reef slopes. They spend much of the day grazing on algae and biofilm from rocks and coral surfaces, using their fused teeth to scrape food from hard substrates. This constant feeding helps maintain reef balance in the wild.

As they grow, parrotfish become powerful swimmers that require space to cruise and turn comfortably. They are not sedentary fish and should never be treated as a decorative addition to a small reef tank. Their natural habitat is bright, warm, oxygen-rich and highly stable, with strong water movement and abundant grazing opportunities.

Tank Setup & Water Parameters

This species demands a very large marine aquarium or public-display style system with robust filtration, high dissolved oxygen and excellent nutrient export. A mature setup with powerful skimming, large biological capacity and regular water changes is essential. Open swimming space is more important than aquascape density, although secure rockwork is still useful for grazing and shelter.

Use a deep sand bed only if it is designed to handle a large, active fish; otherwise, a practical bare-bottom or easy-to-maintain layout may be preferable in specialist systems. Rockwork should be stable and arranged to avoid collapse, as large parrotfish can exert considerable force while feeding and moving through the tank.

Recommended parameters are a temperature of 24-28°C, salinity around 1.023-1.026, pH 8.1-8.4 and strong water movement. Because of the fish’s size and waste output, water quality must be monitored closely. Ammonia and nitrite must always remain at zero, and nitrate should be kept as low as possible. This is not a beginner species and should only be purchased when the system is fully prepared.

Acclimation should be slow and careful, especially for wild-caught marine specimens. Provide subdued lighting at first if the fish is newly introduced, and ensure there are no aggressive tank mates that may harass it during settling in.

Feeding Guide

In the wild, parrotfish are primarily grazers, feeding on algae, detritus and the microscopic life associated with reef surfaces. In captivity, they should be offered a varied marine diet with a strong plant-based component. Suitable foods include marine algae sheets, spirulina-based preparations, herbivore pellets, frozen herbivore blends and chopped marine vegetable matter. Some individuals may also accept meaty marine foods in moderation, but these should not form the core of the diet.

Feed several smaller meals per day where practical, as large parrotfish are active and have a substantial appetite. Providing frequent grazing foods helps support natural behaviour and condition. Avoid overfeeding rich, oily foods, which can place unnecessary strain on water quality and digestive health. A varied, fibre-rich diet is the best approach for long-term success.

Tank Mates / Compatibility

This is a large, robust marine fish that should be housed only with other suitably sized, non-fragile tank mates. Good companions may include large surgeonfish, tangs, large angelfish, triggerfish, puffers and other substantial marine species that can tolerate a powerful, active fish. Compatibility depends heavily on tank size and individual temperament.

Avoid small fish, ornamental crustaceans, delicate reef invertebrates and any species that could be intimidated, injured or outcompeted at feeding time. Because parrotfish are strong grazers, they may also disturb reef structures and are generally not ideal for carefully stocked coral displays. They are best suited to fish-only or large mixed marine systems designed around their needs.

When planning tank mates, always consider the adult size of this fish rather than its juvenile appearance. A specimen that looks manageable at purchase can become a very large, dominant fish over time.

Why Buy from Tropical Fish Co

At Tropical Fish Co, we specialise in quality livestock for serious aquarists and marine enthusiasts. Our team understands the importance of correct handling, careful packing and reliable delivery for sensitive live animals. When you order from us, you benefit from fast UK delivery and a live arrival guarantee for peace of mind.

We aim to provide accurate species information, honest care guidance and healthy stock that is ready to acclimate into a properly prepared system. For unusual and specialist marine fish like the Bicolour parrotfish, that support matters. If you are building a large-scale marine display and want a truly memorable centrepiece, this species offers incredible presence and natural behaviour when kept correctly.

Please ensure your aquarium is fully mature, appropriately sized and equipped before ordering. This is a specialist fish with specialist needs, and success begins with the right environment.