Common name: Wedgetail Triggerfish

General Information

The Wedgetail Triggerfish, known scientifically as Rhinecanthus rectangulus, is a striking species that has captivated aquarists with its unique appearance and engaging behavior. Its distinctive pattern of white, black, and yellow markings, along with its robust body shape, makes it a standout addition to marine aquariums. This species is often referred to by its Hawaiian name, "Humu Picasso Triggerfish," highlighting its artistic color patterns.

The Wedgetail Triggerfish is a popular choice among experienced hobbyists due to its hardy nature and charismatic personality. However, its semi-aggressive temperament requires careful consideration of tank mates. In the wild, this species is found in the Indo-Pacific region, often inhabiting coral reefs and rocky areas.

Care

Caring for the Wedgetail Triggerfish requires a well-maintained aquarium with plenty of swimming space. A tank of at least 300 liters is recommended to accommodate its active lifestyle and territorial tendencies. The tank should be equipped with robust filtration and stable water parameters to ensure the fish's health.

Providing a varied diet is crucial for maintaining the vibrant coloration and overall health of the Wedgetail Triggerfish. While they are not particularly fussy eaters, a diet that includes marine-based proteins such as shrimp, squid, and fish, along with high-quality pellets, will meet their nutritional needs.

Diet and Feeding

In the wild, Wedgetail Triggerfish are omnivorous, feeding on a variety of invertebrates, algae, and small fish. In captivity, they should be offered a diverse diet to replicate their natural feeding habits. A balanced diet includes meaty foods like shrimp and squid, supplemented with high-quality pellets or flakes.

Feed them once or twice daily, ensuring they consume the food within a few minutes to prevent water quality issues. Offering a variety of foods helps prevent nutritional deficiencies and keeps them engaged during feeding time.

Behavior and Compatibility

Wedgetail Triggerfish are known for their bold and curious nature. They can be semi-aggressive, especially towards smaller or similarly shaped fish, so careful selection of tank mates is essential. They thrive in tanks with robust species that can hold their own, such as larger angelfish or tangs.

While they are not reef-safe due to their tendency to nip at invertebrates and corals, they can be a fascinating addition to a fish-only or FOWLR setup.

Reproduction

Breeding Wedgetail Triggerfish in captivity is challenging and not commonly achieved. They exhibit interesting courtship behaviors, but successful breeding requires specific environmental conditions that are difficult to replicate in home aquariums.

Health and Common Issues

The Wedgetail Triggerfish is generally hardy but requires stable water conditions to thrive. Regular monitoring of water parameters and maintaining a clean environment are crucial for preventing common health issues. They can be susceptible to marine ich and other parasitic infections, so quarantine new additions and treat promptly if symptoms arise.

Habitat

In their natural habitat, Wedgetail Triggerfish are found in the Indo-Pacific region, from the Red Sea to South Africa, and as far east as the Hawaiian Islands. They prefer coral reefs and rocky areas, where they can find shelter and hunt for food. In captivity, providing a tank with plenty of rock formations and hiding spots can help mimic their natural environment and reduce stress.