Pacific Double-Saddle Butterflyfish (Chaetodon ulietensis)

Fish in the family Chaetodontidae. Moderate care. Reef Safe with Caution.

Pacific Double-Saddle Butterflyfish

Quick facts

Scientific nameChaetodon ulietensis
FamilyChaetodontidae
Also known asPacific Double-Saddle Butterflyfish
Care levelModerate
Reef safetyReef Safe with Caution
TemperamentSemi Aggressive
Dietomnivore
Adult size7.5 in
Minimum tank size75 gallons
Water parametersTemperature: 72-78°F pH: 8.1-8.3 Salinity: 1.02-1.025
Feeding schedule2-3 times daily

Appearance

The Pacific Double-Saddle Butterflyfish exhibits a distinctive pale yellow to cream body with two prominent dark saddle-like markings crossing the dorsal region—one anterior and one posterior—giving it the "double-saddle" common name. The face is pale with a dark eye-bar, and the dorsal and anal fins are outlined in black, with blue or yellow accents.

Diet and feeding

In captivity, feed frozen mysis shrimp, brine shrimp, and finely chopped marine flesh or prepared marine flake foods. Butterflyfish in the Chaetodon genus naturally feed on small invertebrates, zooplankton, and occasionally coral polyps and algae. Offer food 2–3 times daily in smaller portions.

Difficulty and care for the Pacific Double-Saddle Butterflyfish

Moderate - Requires some experience due to specific dietary water or tank requirements. Best suited for intermediate aquarists.

Common health issues

Marine ich, Fin rot, Swim bladder disorder, Bacterial infections, Fungal diseases

Origin and habitat

Indo-Pacific region, including the Central and South Pacific from the Marshall Islands south to Fiji and the Society Islands (including Tahitian waters, from which the species epithet "ulietensis" derives).

Log Pacific Double-Saddle Butterflyfish in your reef tank

Reef Trak gives you the full record on every species in your tank: acquisition date, source, photos, parameters at time of stocking, and links to maintenance and feeding events. Track Pacific Double-Saddle Butterflyfish alongside everything else in your reef.