Tinker’s Butterflyfish (Chaetodon tinkeri)
The Tinker’s Butterflyfish is the "crown jewel" of the deep-water butterflyfish. Unlike the common Raccoon or Saddleback butterflies found in shallow Indonesian reefs, Tinker’s is a deep-water specialist, typically found at depths of 40m to over 150m. Because they are difficult to collect and come from specialized environments, they are considered a high-end "prestige" fish in the marine hobby.
Key Information
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Common Names: Tinker’s Butterflyfish, Hawaiian Butterflyfish
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Scientific Name: Chaetodon tinkeri
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Origin: Central Pacific (Primarily Hawaii, Johnston Atoll, and parts of the Marshall Islands)
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Max Size: 15 cm (approx. 6 inches)
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Lifespan: 10+ years (with proper deep-water care)
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Temperament: Peaceful to Semi-aggressive
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Diet: Omnivore – Deep-water plankton and small invertebrates
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Care Level: Moderate to Difficult (due to depth-related sensitivity)
Appearance & Identification
Tinker’s Butterflyfish has one of the cleanest, most striking color splits in the animal kingdom:
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The "Diagonally-Split" Look: The body is divided by a sharp diagonal line. The front/upper half is a stark, snowy white, while the back/lower half is a solid, velvety black.
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The Yellow Mask: A bright golden-yellow vertical bar runs directly through the eye.
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The Dots: In the white section, the scales are often tipped with small black dots, creating a subtle "grid" or "polka-dot" effect.
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The Tail: A bright yellow-to-orange tail fin that matches the facial bar.
Behaviour & Tank Compatibility
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Depth Sensitivity: Because they come from very deep, cool water, they can be sensitive to the high temperatures and bright lighting of a standard shallow-water reef tank.
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Aggression: They are generally peaceful but can be territorial toward other butterflyfish of the same shape or genus.
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Reef Safe (with Caution): Like the Muelleri or Pyramid, they are safer than most butterflies, but they may still nip at LPS corals, Zoanthids, or Feather Dusters. They are usually safe with SPS corals.
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Tank Mates: Excellent with Tangs, Angelfish, and Anthias. Avoid keeping them with aggressive "bullies" that might stress them out, as deep-water fish are more prone to stress-induced illness.
Ideal Tank Setup
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Temperature is Critical: They prefer cooler water. Keeping your tank at 22°C–24°C is much better for their long-term health than the standard 26°C.
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Lighting: They are sensitive to intense reef lighting. Provide plenty of shaded overhangs and caves where they can retreat from the "sun."
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Tank Size: A minimum of 285L (75 Gallons).
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Water Quality: They require pristine, high-oxygen conditions. They are accustomed to the incredibly stable and clean waters of the deep reef.
Dietary Needs
They are usually eager eaters once acclimated to aquarium life:
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Diet: Offer a variety of meaty frozen foods like mysis, enriched brine shrimp, and chopped seafood (clam, squid).
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Acclimation: New arrivals may be shy. Offering live blackworms or brine shrimp can help them start eating in a new environment.
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Feeding Frequency: Feed 2–3 times daily.
Why Choose the Tinker’s Butterflyfish?
Tinker’s Butterflyfish is for the serious collector who wants a rare and sophisticated centerpiece. Its stark black-and-white contrast is unlike any other fish in the hobby. While they are more expensive and require cooler water than your typical Indonesian reef fish, their hardiness (once settled) and iconic look make them one of the most rewarding butterflies to own.
