The Longhorn Cowfish EXPERT ONLY(Lactoria cornuta) inhabit the reefs of the Indo-Pacific, usually in the less turbid waters.
The body is yellow and covered with white dots, and is occasionally referred to as the Yellow Boxfish; however, the Longhorn is not to be confused with Ostracion cubicus, commonly called the Yellow or Polka Dot Boxfish.
In the wild, it is not uncommon to see a 20" specimen, while in the aquarium the Longhorn Cowfish tends to be dramatically smaller - 16" or less.
When possible, the Longhorn Cowfish should be the first fish introduced in the tank.
It is intolerant of other Longhorns, so keep it in a large tank, with some live rock for algae scraping.
Use caution if placing the Cowfish Longhorn in a reef tank as it may nibble on tubeworms.
When housed correctly, the Cowfish Longhorn is long-lived.
Similar to other boxfish, the Cowfish Longhorn's skin is poisonous and, when threatened, it will release a toxin lethal to other tank members, including other Longhorns.
Since they are omnivores, the Longhorn Cowfish should be offered a variety of meaty and vegetable foods.
They are slow eaters, and should not be housed with aggressive eaters.
Minimum Tank Size: 75 Gallons
Care Level: Difficult
Reef Compatible: With Caution