Little Shop of Coral
Two Spot Bristletooth Tang (Ctenochaetus binotatus)
Two Spot Bristletooth Tang (Ctenochaetus binotatus)
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A sleek, reef-safe bristletooth tang known for its constant grazing and subtle, refined patterning often highlighted by its signature two-spot marking near the rear of the body. The Two Spot Bristletooth Tang is an excellent “cleanup crew fish” for larger, established reefs, spending the day combing rockwork for film algae and detritus with its specialized bristle-like teeth. Active, useful, and generally less disruptive than many larger tang species.
Why we love it
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Bristletooth grazer that helps keep rockwork clean
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Constantly active without being overly aggressive
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Great utility fish for mature reef systems
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Reef-safe and community-friendly in most setups
Care & Compatibility
Care Level: Moderate
Temperament: Semi-aggressive (mostly peaceful; may spar with other tangs)
Reef Safe: Yes
Diet: Herbivore/Omnivore (heavy film algae grazer)
Adult Size: ~7"
Minimum Tank Size: 90 gallons recommended (larger is better)
Feeding
Even though they graze all day, they still need consistent feeding:
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Nori/seaweed sheets (a few times per week or daily if algae is limited)
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Spirulina-based pellets/flakes
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Frozen herbivore blends + occasional meaty foods for variety
Tip: A well-fed tang is typically less territorial and settles in faster.
Tank & Setup Notes
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Best in established aquariums with natural algae growth
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Provide plenty of rockwork, grazing surfaces, and hiding spots
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Strong flow and stable parameters help keep tangs thriving
Compatibility Tips
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Generally plays well with most reef-safe community fish
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Use caution combining with other Ctenochaetus or similarly shaped tangs unless the tank is large
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If keeping multiple tangs, an acclimation box can reduce initial aggression
Acclimation & Health
Like most tangs, Two Spot Bristletooths can be sensitive to stress during shipping and introduction. Slow acclimation and quarantine (when possible) are strongly recommended for long-term success.
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LIGHT
LOW: Place coral at the bottom of the tank. Depending on the type, coral may need to be placed off sand and therefore mounted on a ceramic disc of piece of rock.
MEDIUM: Place coral at mid-range of the tank. Best placed/glued on top of a rock scape at mid-range height.
HIGH: Place coral from mid range to just below water level. SPS coral are shallow growing so they require and are able to tolerate intense light.
FLOW
LOW: Most soft coral do well with a small, gentle pulse. There are certain corals that can even be placed in areas of indirect flow, meaning places aside a rock structure or set into a entrance to a cave style space.
MEDIUM: Many LPS types of coral prefer medium pulse current. Most Euphyllia or corals that have more tissue structure connected to their skeleton, don’t like to be in a high flow area like the direct flow of the wave pump.
HIGH: Similar to high light, SPS enjoy being in some heavy current. Most LPS and SPS that branch encrust or plate prefer high flow that simulates the top water waves.
SKILL
ENTRY: While some may say beginner level, "Entry" is a good term to be used when starting out in the world of corals and marine life. Prior to adding livestock, you want to ensure that your reef has the proper parameters including zero levels of ammonia and nitrite. Seeing traces of nitrate in your waters is a good sign - just keep them at a lower level of 2ppm to 10ppm. Maintaining correct temperature and salinity are a huge factor to stable parameters. Starting to monitor your PH, alkalinity, calcium and magnesium is a great habit to get into to keep a successful reef.
While some soft coral don’t require too much light, having a proper reef light that puts out the proper pars is very important. You'll also want to have a good amount of flow and protected rock areas, as placing corals in their happy spot is ideal for success.
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