Mustelus californicus

The California Smoothhound (Mustelus californicus) is a medium-sized shark native to the coastal waters of the eastern Pacific. This species is prized in the marine aquarium hobby for its sleek body and gentle nature compared to other shark species. It is best suited for advanced hobbyists due to its specific care requirements and need for a large, well-maintained aquarium.

Care Level: Intermediate to advanced. This species requires stable water parameters and a spacious environment.

Temperament: Generally docile and non-aggressive, making it compatible with other large, peaceful fish. Avoid housing with small or aggressive species.

Diet: Carnivorous. Feed a varied diet of fresh seafood such as shrimp, squid, and fish fillets. Supplement with high-quality marine carnivore pellets to ensure balanced nutrition.

Minimum Tank Size: At least 600 litres (approx. 130 UK gallons) to provide ample swimming space and reduce stress.

Water Parameters: Maintain temperature between 22-26°C, salinity at 1.023-1.025 SG, pH 8.1-8.4, and stable water quality with efficient filtration and regular water changes.

Lighting and Water Flow: Moderate lighting and gentle to moderate water flow to mimic natural coastal habitats.

Placement: Provide open swimming areas with some hiding spots using rockwork or artificial caves. Avoid overcrowding to reduce stress.

Origin: Eastern Pacific, primarily off the coast of California.

Maximum Size: Typically grows up to 1.2 metres in length in captivity.

Due to their size and specialised care needs, California Smoothhounds are recommended for marine aquarists with experience in keeping large predatory fish. Proper husbandry ensures a healthy, long-lived specimen that adds a unique presence to your marine collection.