More info
Datasheet
| Minimum Tank Size | 1500 litres / 396.26 US gallons |
| Maximum Size | 30.0cm / 11.81inches |
| Reef Compatible | Not reef safe |
| Temperament | Aggressive towards other species |
| Temperature | 22.2°C / 71.96°F - 25.6°C / 78.08°F |
| Specific Gravity | 1.020-1.025 |
| Carbonate Hardness | 8-12 |
| pH | 8.1-8.4 |
General Description
The Wedge-tail triggerfish (Rhinecanthus rectangulus) belongs to the Balistidae family and is recognized by its powerful jaws used for crushing rocks, shells, or corals during feeding. These fish vary in behavior both between species and individual specimens. They are typically non-reef safe and challenging to maintain in a coral aquarium due to their aggressive nature.
Aquarium Suitability
Considered suitable with care, the Wedge-tail triggerfish is known to be aggressive towards other fish species, particularly smaller ones, and can pose a threat to crustaceans like shrimps, crabs, and snails. They may also exhibit a tendency to bite materials like wires and plastics in the tank.
Demands, Care, and Hardiness
These fish have an average hardiness level and require a minimum tank size of 1500 liters. To mitigate their aggressive behavior, providing regular feeding, ample hiding spots, and sufficient space is recommended. They need a varied diet consisting of krill, Mysis, shrimps, crabs, mussels, small fish, octopus, snails, and algae-based foods.
Reef Suitability
Due to their predatory and aggressive tendencies, the Wedge-tail triggerfish are not considered reef-safe and can disturb coral formations. They have a penchant for rearranging rocks and sand in the tank.
Aquarium Setup
When setting up an aquarium for Wedge-tail triggerfish, it is essential to include good hiding places such as live rocks. Securely placing rocks on the substrate is crucial to prevent toppling. Maintaining water conditions within the ranges of pH 8.1-8.4, temperature of 22.2-25.6°C, a specific gravity of 1.020-1.025, and a carbonate hardness of 8-12 dKH is vital for their well-being.
Behaviour
These triggerfish have unique personalities, with some individuals displaying amusing behaviors such as creating grunting sounds when feeling threatened. They have been observed swirling sand to uncover food and are known to spray water, necessitating caution around electrical equipment.
Feeding and Diet
To prevent excessive tooth growth, providing food like clams that aid in tooth wear is crucial. Their diet should include fish, larger crustaceans, other invertebrates, and small crustaceans like krill and mysis to ensure a balanced nutrition intake.
Habitat and Distribution
The Wedge-tail triggerfish are native to the Indo-Pacific region, ranging from the Red Sea to the Marquesan Islands. They are commonly found in waters from Japan to South Africa, preferring rocky and coral-rich habitats.