Rectangular Trigger Fish - Rhinecanthus rectangulus - Rectangle - Reef Wedge-Tail Triggerfish

The Rectangular Trigger fish, also known as the Humu Rectangle Triggerfish, Wedge-tailed Trigger, or the V-line Humuhumu, has a pearly white face and two blue and black stripes across the eyes. It is also recognized by the black V-pattern outlined in yellow that highlights the posterior section of the body.

The Rectangular Trigger fish needs a 75 gallon or larger aquarium with rocks and caves. It may rearrange the landscaping and rocks. It vocalizes using a "grunting" sound.

The Rhinecanthus rectangulus or Rectangular Trigger fish is a popular aggressive tank mate. Though mild mannered as juveniles it will learn to not only feed from owners' fingers but feed on owners' fingers if given the chance. Belligerence will increase with age. Should be kept with fish the same size or larger. May bite eather tubes, air-line tubing and disrupt aquarium aquascaping. Like many triggers they can be taught to accept hand feedings and will often learn to grunt in participation or an attempt to talk you into a feeding.

Maximum Size: This species grows to 12 inches in length.

General Size: This Rectangular trigger fish is about seven to eight inches in length.

Minimum Tank Size Suggested: A 75 gallon or larger aquarium provides a good environment for these Rectangular trigger fish.

Tank Conditions: The Rectangular trigger fish should ideally be kept in temperatures between 72 and 78 degrees Fahrenheit. A pH value of 8.1 or 8.4, and a specific gravity of 1.020 to 1.025 should be maintained. When kept with invertebrates, the specific gravity range should be 1.020 to 1.025, for the invertebrate species. In a fish only aquarium, the specific gravity should fall between 1.020 and 1.023.

Habitat: The Rectangular trigger fish occurs on coral reefs in tropical marine waters of the Indo-Pacific. In Australia, the Rectangular trigger fish is known from central to north-western Western Australia and from the entire length of the Great Barrier Reef south to northern New South Wales.

Feeding and Diet: The Rectangular trigger fish diet consist of meaty foods such as live shrimps, live fishes and sometimes crustacean flesh. They are carnivorous.

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