Opistognathus castelnaui

The Opistognathus castelnaui, also known as the yellowhead jawfish, is a striking and fascinating addition to the marine aquarium. This fish species is known for its unique behavior and vibrant color...

The Opistognathus castelnaui , also known as the yellowhead jawfish, is a striking and fascinating addition to the marine aquarium. This fish species is known for its unique behavior and vibrant colors, making it a popular choice among advanced aquarists. The Opistognathus castelnaui originates from the Indian and western Pacific Oceans, where it lives on sandy bottoms and nests in burrows it digs itself. Its inquisitive nature and unusual burrowing habits make it not only a feast for the eyes but also an interesting animal to observe. Due to its relatively peaceful nature, this fish can coexist well with other non-aggressive species, provided the aquarium meets its specific needs. Choose the Opistognathus castelnaui if you want to enrich your aquarium with an active and characterful resident.

Features

• Origin: Indian Ocean and western Pacific Ocean
• Maximum length: approximately 18 cm
• Appearance: Yellow head with light blue body and pronounced beak
• Behavior: Ground dweller that digs burrows and can be territorial
• Diet: Carnivore, eats mainly small crustaceans and fish
• Suitable for: Advanced aquarists with a well-equipped marine aquarium
• Life expectancy: 5 to 7 years with good care

Care

• Minimum aquarium size: 300 liters with a sandy bottom
• Water parameters: Temperature 23-27°C, pH 8.1-8.4, salinity 1.020-1.025
• Provide plenty of hiding places and loose stones for digging burrows
• Feed with frozen food such as mysis, artemia and small pieces of fish
• Avoid aggressive tankmates and large predatory fish
• Note: Cover the aquarium well, as this species can jump.