Acanthurus nigricaudus

Identification	Pale gray body with a distinctive black shoulder spot and a black caudal fin edged in white. Yellow pectoral fins add a subtle splash of color.
Maximum Length	Up to 16 inches (40 cm)
Origin	Indo-Pacific — Red Sea to Hawaii
Minimum Tank Size	200 gallons
Reef Compatible	Yes — safe with corals and invertebrates

Behavior

A peaceful tang that does well in large reef systems. It is an active swimmer and tends to be less aggressive toward other tangs than many Acanthurus species. Best kept singly unless the tank is very large.

Diet & Feeding

Herbivore. Provide a varied diet of dried seaweed (nori), spirulina, and marine algae offered on a clip daily. Also accepts pellets and flake foods formulated for herbivores.

Cautions

Requires significant swimming space due to its adult size. Territorial toward other members of its genus in smaller systems.