Species Description…

Scientific Name: Chaetodon lineolatus

Common Name: Lined Butterflyfish

Species Group: Butterflyfish

Habitat: Reef Safe with Caution

Care Level: Intermediate

Temperament: Peaceful

Diet Type: Omnivore

Role in Aquarium: Showpiece Fish

Max Fish Length: 6 (inches)

Min Aquarium Size: 125 (gallons)

Native Range: Indo-Pacific

Chaetodon Lineolatus - The Lined Butterflyfish

Chaetodon Lineolatus (The Lined Butterflyfish)

Native to the Indo-Pacific region, commonly found in coral reefs, lagoons, and reef slopes.
Recognizable by its large, elongated body with bold black vertical stripes and a yellow-tinted dorsal region.
One of the largest species in the butterflyfish family, requiring a spacious environment.
Often seen swimming in pairs or small groups in the wild, demonstrating social behaviors.
Best suited for experienced aquarists due to its dietary preferences and space requirements.

Omnivorous, feeding on coral polyps, small invertebrates, and algae in the wild.
In captivity, it requires a varied diet consisting of marine algae, frozen mysis shrimp, high-quality pellets, and sponge-based foods.
May take time to transition to prepared foods, so offering a mix of fresh and frozen options helps with acclimation.
Multiple small feedings per day mimic its natural grazing behavior and improve overall health.
A well-balanced diet supports its vibrant coloration and prevents malnutrition.

Prefers coral-rich environments with moderate water movement and plenty of rocky formations.
Often found near reef slopes and sheltered coastal areas where food sources are abundant.
Aquarium setups should include live rock for grazing and provide multiple hiding spaces.
Requires excellent water quality with stable conditions to thrive in captivity.
Providing shaded areas alongside open swimming spaces encourages natural behaviors.

Optimal water temperature: 74-82°F (23-28°C) to maintain a healthy metabolism.
Preferred pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
Requires strong filtration and frequent water changes to prevent the buildup of organic waste.
Not reef-safe, as it will nip at coral polyps and sessile invertebrates.
Providing live rock structures supports natural grazing behavior and offers environmental enrichment.

Generally peaceful but may become territorial if housed with other butterflyfish in confined spaces.
Compatible with tangs, angelfish, and other semi-aggressive marine species.
Not suitable for reef aquariums due to its tendency to graze on corals.
Should not be housed with overly aggressive species that could cause stress or competition for food.
Providing ample swimming room and rock formations minimizes stress and aggressive interactions.

An active and confident swimmer that explores its surroundings frequently.
Often observed picking at rock surfaces and interacting with its environment.
May take time to acclimate to a new environment but becomes more social over time.
Providing live rock enhances foraging behaviors and creates a more engaging tank setup.
Over time, it may develop recognition of its caretaker and show curiosity, particularly during feeding sessions.