Harlequin Tuskfish (Choerodon fasciatus)
The Harlequin Tuskfish is widely considered one of the most spectacular fish in the marine hobby. A member of the Labridae (Wrasse) family, it is prized for its high-contrast "tiger stripes" and its remarkable blue teeth. While it is a predator, it is often described as the "perfect" centerpiece for a large semi-aggressive tank because it is generally peaceful toward fish it cannot swallow.
Key Information
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Common Names: Harlequin Tuskfish, Harlequin Tusk
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Scientific Name: Choerodon fasciatus
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Origin: Western Pacific (Australia, Philippines, Vietnam, Indonesia)
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Max Size: 25–30 cm (approx. 10–12 inches)
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Lifespan: 10+ years
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Temperament: Semi-aggressive; peaceful with larger fish, predatory toward inverts
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Diet: Carnivore – Loves meaty seafood
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Care Level: Moderate
Appearance & Identification
The Harlequin Tusk is a visual masterpiece with a "prehistoric" edge:
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The Pattern: Features vibrant orange and white vertical bands outlined in an iridescent electric blue.
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The Teeth: Its most striking feature is a set of four sharp, blue canine teeth that protrude from its mouth, used for crunching through the shells of crabs and snails.
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Regional Differences: * Australian Locale: Generally considered the "premium" choice. They have more intense colors, specifically brighter orange bands and deeper blue edges.
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Indo-Pacific Locale: Often slightly more muted in color but still very beautiful.
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Behaviour & Tank Compatibility
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The Gentle Predator: Despite the scary teeth, they are surprisingly docile toward other fish. They do not have the "bully" personality often seen in large wrasses.
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Invertebrate Risk: Not safe with small invertebrates. They will make a quick meal out of ornamental shrimp (Cleaner, Fire, or Peppermint shrimp), small crabs, and snails.
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Reef Safe (with Caution): They are 100% safe with corals. They do not nip at polyps. However, because they are messy eaters and love to flip over rocks and corals to look for food, they are best suited for large reefs with stable rockwork.
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Tank Mates: Excellent with Tangs, Angelfish, Triggers, and large Wrasses. Avoid keeping them with very small fish (like Neon Gobies) that might be mistaken for food.
Ideal Tank Setup
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Tank Size: A minimum of 475L (125 Gallons) is required. They are active swimmers and grow into thick, powerful fish.
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Rockwork: Provide a secure and stable rock structure. Tuskfish are known to use their powerful jaws to move small rocks or rubble while hunting.
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Lid: Like all wrasses, they are capable of jumping, especially if startled at night. A secure, heavy lid is mandatory.
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Feeding: They are "food-motivated." Offer a variety of meaty items like frozen mysis, krill, chopped squid, and clams. It is important to feed them high-quality, vitamin-enriched foods to maintain their intense colors.
Why Choose the Harlequin Tuskfish?
The Harlequin Tusk is for the hobbyist who wants a hardy, long-lived, and visually stunning inhabitant. It has a high "IQ" for a fish, often recognizing its owner and displaying curious, observant behavior. It brings a unique, ancient look to the aquarium, and as long as you are willing to sacrifice your ornamental shrimp, it is one of the most rewarding large wrasses you can own.
