The Cyclichthys orbicularis, commonly known as the Orbicular Pufferfish, is a striking species prized by marine aquarium enthusiasts for its distinctive rounded body and captivating behaviour. This large pufferfish can grow to a considerable size, making it suitable only for experienced hobbyists with ample tank space.
Temperament and Compatibility: Generally peaceful but can be territorial, especially towards other puffers or slow-moving fish. It is best kept singly or with robust tankmates that can tolerate its occasional defensive behaviour. Avoid housing with small, delicate fish that may be harassed.
Diet: Omnivorous with a preference for hard-shelled invertebrates such as molluscs and crustaceans. Supplement its diet with a variety of meaty foods including frozen shrimp, squid, and specialised puffer pellets to maintain beak health.
Tank Requirements: A minimum tank size of 150 litres is recommended for a large specimen to provide sufficient swimming space and territory. The aquarium should be well-established with stable water parameters and plenty of hiding places created by rocks and caves.
Water Conditions: Maintain temperature between 24-27°C, salinity at 1.020-1.025 SG, and pH around 8.1-8.4. Moderate water flow is ideal to mimic natural reef environments without stressing the fish.
Reef Compatibility: With Caution. While not inherently destructive to corals, its diet and behaviour may pose risks to invertebrates and smaller reef inhabitants.
Overall, the Cyclichthys orbicularis is a fascinating addition to a marine aquarium for those prepared to meet its specific care needs.
