🐠 Two Spot Bristletooth Tang (Ctenochaetus binotatus)
🐠 Two Spot Bristletooth Tang (Ctenochaetus binotatus)
Marine Surgeonfish • Algae Grazer • Reef-Associated Species • Active Utility Fish
📋 The Two Spot Bristletooth Tang (Ctenochaetus binotatus) is a compact algae-grazing surgeonfish recognized by its two pale spots behind the eyes and fine bristle-like teeth. These specialized teeth allow it to scrape film algae and detritus from rocks and hard surfaces, making it a valuable utility fish in marine aquariums.
This species typically displays a subtle but attractive pattern of fine body spotting or striping, with coloration that can shift depending on mood and lighting. As with other bristletooth tangs, it is more focused on grazing than on open-water aggression, though it may become territorial with similar-shaped tangs or other Ctenochaetus species.
Ideal for medium to large reef or fish-only systems, the Two Spot Bristletooth Tang offers a balance of algae control, constant activity, and interesting behavior without the extreme size of larger surgeonfish.
💡 Highlights
✨ Distinct Two Eye-Spots: Pale spots behind each eye give the species its name
⚪ Efficient Algae Grazer: Special bristle teeth for film algae and detritus
📏 Compact Tang Size: Maxes out around 16 cm, smaller than many tangs
✅ Generally Reef Safe: Focuses on algae rather than corals
🐠 Active Utility Fish: Constant grazer that helps keep rockwork clean
🧾 A Quick Look at the Two Spot Bristletooth Tang
📛 Common Name: Two Spot Bristletooth Tang
🔬 Scientific Name: Ctenochaetus binotatus
👨👩👧 Family: Acanthuridae
🌍 Origin: Indo-Pacific
📏 Max Size: 16 cm (≈ 6.3″)
💧 pH Range: 8.0–8.4
🌡️ Temperature Range: 24–27 °C (≈ 75–81 °F)
🧠 Care Level: Intermediate
💖 Temperament: Semi-aggressive toward other tangs
🪸 Reef Safe: ✅ Yes
🏠 Min Tank Size: 350 L (≈ 92 US gallons)
📌 Tank Level: Mid–Reef Zone
🧬 Captive Bred: ❌ No
🌿 Wild Caught: ✅ Yes
⏳ Lifespan: 7–10+ years
🍽️ Diet: Herbivore (algae and detritus grazer)
🐣 Reproduction: Pelagic spawner in the wild

