The Horn Shark (Heterodontus francisci) is a fascinating species native to the coastal waters of the eastern Pacific Ocean, particularly around California. Recognisable by its blunt head, prominent ridges above the eyes, and distinctive horn-like dorsal spines, this shark is a popular choice among experienced marine aquarists seeking a unique addition to their collection.
Care Level: Moderate to advanced. This species requires stable water conditions and a suitably large aquarium to thrive.
Temperament: Generally peaceful and slow-moving, the Horn Shark is nocturnal and spends much of its time resting during the day. It is best kept with non-aggressive tank mates to avoid stress.
Diet: Carnivorous. In captivity, feed a varied diet of meaty foods such as shrimp, squid, clams, and specialised shark pellets. Feeding should be done in the evening to mimic natural nocturnal feeding habits.
Minimum Tank Size: A minimum of 500 litres (approximately 130 gallons) is recommended to provide ample swimming space and territory.
Lighting Requirements: Moderate lighting is sufficient, with dimmer conditions preferred during the day to accommodate its nocturnal nature.
Water Flow: Moderate water flow replicates natural coastal environments and helps maintain water quality.
Placement: Provide plenty of hiding places such as caves and rockwork to allow the shark to rest during daylight hours. A sandy or fine gravel substrate is preferred to protect its sensitive underside.
Origin: Eastern Pacific Ocean, primarily off the coast of California.
Maximum Size: Up to 1.2 metres (approximately 4 feet) in length.
Reef Safe: No. The Horn Shark may prey on invertebrates and small fish, making it unsuitable for reef aquariums.
Due to its size and specialised care requirements, the Horn Shark is recommended for experienced marine aquarists with access to large, well-maintained aquarium systems.
