Tomini Surgeonfish (Ctenochaetus tominiensis) M 13cm

Overview

The Tomini Surgeonfish Ctenochaetus tominiensis is a highly sought-after reef fish prized for its peaceful temperament, attractive subtle patterning and excellent algae-grazing behaviour. Often chosen as a more manageable surgeonfish for established marine aquariums, this species is a superb addition to reef systems where a reliable grazer is needed to help control film algae and keep rockwork looking clean.

Our medium-sized Tomini Surgeonfish is supplied as a robust marine fish suitable for experienced saltwater keepers and committed reef hobbyists. With proper care, stable water quality and a varied diet, this species adapts well to aquarium life and becomes an active, engaging presence in the tank. As with all live livestock, we offer a live arrival guarantee and fast UK delivery for peace of mind.

Although generally peaceful, the Tomini Surgeonfish is still a surgeonfish and should be housed with suitable tank mates and ample swimming space. It is best kept in mature marine aquariums with plenty of live rock, strong filtration and consistent maintenance. In the right environment, it can thrive for many years and become a valuable part of a reef community.

Care at a Glance

Origin & Natural Habitat

Ctenochaetus tominiensis originates from the Indo-Pacific region, with a natural range associated with reef slopes, lagoons and areas rich in algae growth and detritus. In the wild, Tomini Surgeonfish spend much of their time picking at rock surfaces, sand and coral rubble, using their specialised bristle-like teeth to graze on microalgae, organic film and fine detritus.

This natural feeding style makes them especially useful in reef aquariums, where they can help reduce nuisance film algae and contribute to a more balanced ecosystem. Their behaviour is generally calm and methodical rather than frantic, and they are often seen moving through the aquascape in search of grazing opportunities.

Because they come from stable tropical marine environments, they appreciate clean, well-oxygenated water and a tank that has matured biologically before introduction. A newly set-up aquarium is not suitable for this species.

Tank Setup & Water Parameters

The Tomini Surgeonfish does best in a spacious marine aquarium with plenty of open swimming room and generous live rock for grazing. A mature reef tank of at least 300 litres is recommended, though larger systems are always better for long-term health and reduced stress. Good water movement, strong protein skimming and efficient filtration are important to maintain excellent water quality.

Provide a varied rockscape with natural grazing surfaces and avoid overcrowding the tank. This species is active but not overly boisterous, so it benefits from a peaceful environment where it can feed without competition. Secure all equipment and ensure the aquarium has a tightly fitting lid or cover where appropriate, as marine fish can jump when startled.

Stable parameters are essential. Aim for a temperature of 24–27°C, pH between 8.1 and 8.4, and low nitrate levels. Salinity should be kept consistent, and sudden swings should be avoided. Regular partial water changes and careful monitoring will help keep the fish in top condition.

When introducing your Tomini Surgeonfish, acclimate it slowly to reduce stress. As with all live marine livestock, our fast UK delivery and live arrival guarantee are designed to help your fish arrive in the best possible condition.

Feeding Guide

The Tomini Surgeonfish is primarily herbivorous and detritivorous, with a natural preference for fine algae, biofilm and organic matter. In captivity, it should be offered a varied diet that includes marine algae sheets, spirulina-based foods, quality herbivore pellets and frozen foods designed for marine grazers.

Feed small amounts several times a day where possible, especially in established reef systems where natural grazing alone may not be enough. Nori or other seaweed should be available regularly, ideally clipped to the glass or placed in a feeding station. Supplementing with algae-rich foods helps support colour, vitality and digestive health.

While this species will graze continuously throughout the day, it should not be relied upon as a sole algae-control solution. A balanced feeding regime is still necessary, particularly in tanks with limited natural growth. Avoid overfeeding meaty foods, as a fibre-rich diet is more appropriate for long-term wellbeing.

Tank Mates / Compatibility

Tomini Surgeonfish are generally peaceful and can be kept with a wide range of reef-safe tank mates, provided the aquarium is large enough and stocking is sensible. They usually coexist well with clownfish, gobies, wrasses, anthias, chromis and other non-aggressive marine species. They are also suitable for many coral reef setups, as they are considered reef-safe with corals and invertebrates.

As with most surgeonfish, compatibility depends on tank size and individual temperament. In smaller aquariums, territorial disputes may occur with other tangs or surgeonfish, especially if they occupy similar swimming zones or feeding niches. Introducing the Tomini Surgeonfish before more dominant species can sometimes help reduce aggression.

Provide multiple feeding points and plenty of rockwork to break up sight lines. This can reduce competition and allow the fish to settle more comfortably. Avoid housing with highly aggressive species that may harass or outcompete it for food.

Why Buy from Tropical Fish Co

At Tropical Fish Co, we specialise in healthy, responsibly sourced marine livestock and aim to make online fishkeeping as reliable and enjoyable as possible. Every order is packed with care, and our live arrival guarantee gives you added confidence when purchasing delicate saltwater species online.

We offer fast UK delivery, careful handling and a commitment to quality from dispatch to arrival. Our Tomini Surgeonfish is selected for health, condition and suitability, so you can add a beautiful and useful algae grazer to your reef with confidence.

Whether you are building a peaceful reef community or looking for a dependable herbivore to help maintain your display, the Tomini Surgeonfish is an excellent choice. With the right aquarium, stable water conditions and a varied diet, it can become a long-lived and rewarding marine fish for your collection.