Description
Xanthic Lieutenant Tang – Acanthurus tennentii (Collector’s Corner)
Acanthurus tennentii, commonly known as the Lieutenant Tang, is already a respected large surgeonfish admired for its elegant profile and flowing finnage, but true xanthic specimens elevate the species into an entirely different category of rarity. This aberrant individual displays a dramatic reduction or alteration of normal pigmentation, replacing the species’ conventional darker tones with luminous yellow to golden coloration that immediately transforms its appearance into something unmistakably exotic and highly collectible.
Unlike selectively bred freshwater morphs, xanthic marine tangs occur as exceptionally rare natural pigmentation anomalies, making each specimen effectively one-of-one in presentation. The contrast between the glowing yellow body and the species’ naturally sleek shape creates a surreal, almost unreal aesthetic that stands apart even within elite tang collections.
What makes xanthic surgeonfish particularly desirable is their instant visual impact. No explanation is needed—the rarity is immediately obvious at first glance. Well-balanced coloration, clean finnage, and stable condition dramatically increase collector value, especially in larger specimens where the aberrant pigmentation is fully developed and evenly expressed.
Collector’s Note:
True xanthic Acanthurus tennentii specimens are extraordinarily uncommon in the marine aquarium trade and are seldom encountered in export. Individuals displaying strong, stable yellow pigmentation across the body and fins are considered ultra-rare collector pieces with significant visual and rarity-driven appeal.
Lighting: Moderate to high; strong reef lighting enhances contrast and overall coloration
Flow: High; thrives in strong, well-oxygenated water movement
Placement: Active swimmer occupying mid to upper water column with extensive open swimming space
Temperature: 75–80°F (24–27°C)
Salinity: 1.0265 SG (35 PPT)
pH: 8.1–8.4
Alkalinity: 8–10 dKH
Diet: Herbivorous; requires a diet rich in marine algae, nori, and high-quality herbivore preparations, supplemented with frozen foods
Aggression: Semi-aggressive; may become territorial toward other tangs, particularly in confined systems
Adult Size: Up to 30 cm
Care Level: Intermediate to Advanced – requires spacious aquariums, strong filtration, and stable water quality
Compatibility: Reef-safe; best suited for large reef or fish-only systems with ample swimming space and carefully selected tank mates
