Heterodontus japonicus, commonly known as the Japanese Bullhead Shark, is a temperate water species prized for its distinctive appearance and manageable size. This small shark is best suited to aquarists with experience in maintaining cooler marine environments.
Care Level: Moderate to advanced due to specific temperature and habitat needs.
Temperament: Generally peaceful but may show territorial behaviour towards conspecifics or smaller tankmates.
Diet: Carnivorous; feeds on a variety of meaty foods including crustaceans, molluscs, and prepared marine diets.
Minimum Tank Size: At least 300 litres (approximately 80 gallons) to provide adequate swimming space and environmental stability.
Water Parameters: Prefers cooler temperatures ranging from 14°C to 20°C, reflecting its temperate origin. Stable water quality with moderate flow is essential.
Compatibility: Best housed with similarly sized or larger non-aggressive species. Avoid small fish or invertebrates that may be seen as prey.
Placement: Provide a tank with ample hiding places such as caves and rocky structures to mimic natural habitat and reduce stress.
Origin: Native to temperate waters around Japan and neighbouring regions.
Maximum Size: Typically grows up to 1 metre in length, though smaller specimens are available.
Due to its specialised care requirements and temperate water needs, Heterodontus japonicus is recommended for dedicated marine aquarists with appropriate tank setups.
