The Kole tang is a smaller, reef-safe bristletooth surgeonfish with a dark, finely striped body and a distinctive bright yellow ring around the eye. Unlike the larger Zebrasoma and Acanthurus tangs, it has comb-like bristle teeth specialized for rasping film algae and detritus, making it one of the best clean-up grazers for the rockwork and glass. Its modest size suits more moderate reef tanks.
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Tangs and surgeonfish are active, algae-grazing reef fish prized for bold color and constant motion. Most need large tanks with open swimming room, good flow, and a steady supply of marine algae to graze.
From the minimum an animal needs to be kept humanely, up to the ideal setup. Bigger is almost always better — minimums are floors, not targets.
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Minimum
Reef-safe algae grazer
75 gal / 284 L reef
Ctenochaetus strigosus reaches 6 in and is one of the smaller, more reef-safe tangs. 75-gal reef minimum with mature live rock, abundant film algae for grazing, and peaceful tankmates. Length matters for swim activity.
Photo coming soon
Recommended
Mature reef display
125 gal / 473 L reef
125-gal reef with deep aquascape, abundant film algae, mature ecosystem, and peaceful community. Best algae-grazing tang available — keeps rockwork clean of detrital film.
Photo coming soon
Ideal
Large display reef
180 gal+ / 681 L+ display reef
Mature 180-gal+ display reef with deep aquascape, abundant algae, peaceful community, and long swim length. Long-lived and constantly active in good systems.
Life & growth stages
How this animal changes through its life — each stage often has its own care, diet and space needs.
Photo coming soon
Egg
Fish eggs are small, translucent spheres, often laid in clutches on plants, substrate, or in a nest — or carried/brooded by a parent in livebearing and mouth-brooding species. A dark eye spot and the curled embryo become visible inside as development progresses.
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Fry
Newly hatched fry are tiny and semi-transparent, frequently still carrying a yolk sac that fuels them before they feed freely. They lack full fin structure and adult coloration, staying near cover until they can swim and forage on their own.
Photo coming soon
Juvenile
Juveniles look like miniature adults but with developing fins and muted or different markings; many species shift pattern and color as they mature. Growth is rapid at this stage given clean water and steady feeding.
Adult
Adults show the species' full size, finnage, and mature coloration, and are sexually mature. Many fish develop sex-specific differences in size, color, or fin shape, which can intensify during breeding.
Habitat & enclosure
A system of at least 285 L (75 gal) with a length of around 1.2 m (4 ft) and abundant live rock suits this active grazer. Keep temperature 24-27 C (75-81 F), pH 8.1-8.4, salinity SG 1.020-1.026, and alkalinity 8-12 dKH, with low nitrate. Moderate flow and bright reef lighting encourage the film algae it constantly rasps.
Substrate
Aragonite sand with extensive live rock is ideal, as the rock and substrate film provide its primary natural food source and foraging surface.
Equipment & setup
Standard reef filtration with a protein skimmer, reliable heater, and moderate circulation pumps works well. Reef lighting supports the beneficial algae film it grazes.
Diet
Grazes film algae, diatoms, and detritus from rock and substrate using bristle-like teeth; it does not tear at sheet algae the way Zebrasoma do. Supplement with nori, herbivore preparations, and occasional meaty foods, especially in newer tanks with limited algae film.
Behavior & temperament
Reef-safe and relatively peaceful, though territorial toward other Ctenochaetus and similarly shaped tangs. Generally one of the easier tangs to mix into a community and can sometimes be kept with dissimilar tangs in larger systems. The tail spine can still cut, so handle carefully.
Health
Susceptible to marine ich and velvet, though reasonably hardy. Prone to thinning/weight loss in tanks with insufficient grazing film, so monitor body condition. Quarantine new fish and keep water stable.
Tips, DIY & hacks
Drip-acclimate and quarantine for a few weeks. Add it to an established tank with some algae film already present so it has food on arrival, and supplement with nori to keep weight on. It is an excellent natural detritus and film-algae cleaner for reef rockwork.
