Lined Butterflyfish

The Lined Butterflyfish holds the distinction of being the largest species in the entire butterflyfish family, reaching an impressive 12 inches in total length. Its elongated, laterally compressed body is adorned with thin vertical dark lines running from the dorsal area down toward the belly, set against a white to pale silver background. A bold black band runs from the dorsal fin down through the caudal peduncle, and the characteristic dark eye bar is present. The fins are highlighted in bright yellow, adding a vivid accent to this otherwise subtly patterned giant.

Due to its large adult size and specialized dietary requirements, Chaetodon lineolatus is rated as an expert-only species that demands a very large aquarium of at least 180 gallons. In the wild, it feeds on coral polyps, anemones, and various invertebrates across expansive reef territories. In captivity, convincing this species to accept prepared foods can be extremely challenging, and even when successful, it requires substantial quantities of food to maintain its large body size.

Despite its feeding challenges, the Lined Butterflyfish is peaceful toward other fish and can be housed with a variety of community tankmates in suitably large systems. It is absolutely not reef-safe, as it readily consumes corals and anemones. This species requires excellent water quality, strong filtration, and significant swimming space. Only experienced aquarists with appropriately sized systems should consider this impressive but demanding species.