Longhorn Cowfish (Lactoria cornuta)

Fish in the family Ostraciidae. Expert care. Not Reef Safe.

Quick facts

Scientific nameLactoria cornuta

FamilyOstraciidae

Care levelExpert

Reef safetyNot Reef Safe

TemperamentPeaceful

Dietomnivore

Adult size20 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

Yellow body with white-edged blue spots and distinctive horn-like projections above the eyes and at the rear of the body. The boxy, rigid frame and defensive spines make it instantly recognizable.

Diet and feeding

Feed a varied diet including small crustaceans (mysis shrimp, copepods), small mollusks, and quality flaked foods. Offer food 2-3 times daily in small portions. Avoid overfeeding to maintain water quality.

Difficulty and care for the Longhorn Cowfish

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 Disease, Bacterial Infections, Parasitic Infestations

Origin and habitat

Indo-Pacific region from the Red Sea to Hawaii, including Indonesia, Philippines, and Great Barrier Reef.

Log Longhorn Cowfish 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 Longhorn Cowfish alongside everything else in your reef.

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