Saltwater Aquarium Guide: Cubicus Boxfish (Ostracion cubicus)

Quick Stats:

• Care Level: Moderate
• Temperament: Peaceful
• Diet: Omnivore
• Reef Safe: Yes
• Minimum Tank Size: 180 gallons
• Maximum Size: 18 inches
• Water Parameters: pH 8.1-8.4, Salinity 1.020-1.025, Temperature 72-78°F

Now let’s dive into a comprehensive guide about the Cubicus Boxfish (Ostracion cubicus).

Habitat:

The Cubicus Boxfish is found in the Indo-Pacific region, particularly in the waters of the Indian and Pacific oceans. They inhabit coral reefs, lagoons, and rocky areas with plenty of hiding spots.

Reef Safe:

The Cubicus Boxfish is considered reef-safe as it generally does not harm corals or other invertebrates. However, caution should be exercised when keeping them with delicate corals, as they may nip at their polyps.

Size:

The Cubicus Boxfish can reach a maximum size of about 18 inches in captivity.

Temperament:

These boxfish are generally peaceful and can be kept with various tankmates. However, they may become territorial if the tank is too small or if they feel threatened.

Sexual Dimorphism:

There are no visible differences between males and females of the Cubicus Boxfish species.

Lifespan:

The average lifespan of the Cubicus Boxfish is around 5 to 10 years, but with proper care, they can live even longer.

Diet in Aquariums:

Cubicus Boxfish are omnivores and require a varied diet. They should be fed high-quality marine pellets, frozen foods such as brine and mysis shrimp, and occasional live foods like small crustaceans. Providing a balanced diet to ensure their health and vibrant coloration is significant.

Aquascaping Recommendations:

When setting up the aquarium for Cubicus Boxfish, it is essential to provide plenty of hiding spots and caves as they like to explore and seek shelter. Use live rock to create a natural environment and include open spaces for swimming.

Captive Bred Availability:

The Cubicus Boxfish is not commonly available as captive-bred. Most specimens in the aquarium trade are wild-caught. It is important to source them from reputable suppliers who practice ethical and sustainable collection methods.

Compatibility with Other Fish, Invertebrates, or Corals:

The Cubicus Boxfish is generally compatible with other peaceful fish species and most invertebrates. However, caution should be exercised when keeping them with aggressive or territorial fish, as they may become stressed. As for corals, they are generally safe to keep with most species, but delicate corals may be at risk of being nipped.

5 Recommended Tankmates:

• 1. Purple Tang (Zebrasoma xanthurum) – Peaceful and adds vibrant color to the tank.
• 2. Royal Dottyback(Pictichromis paccagnellae) – Peaceful and adds interesting behavior to the tank.
• 3. Firefish Goby (Nemateleotris magnifica) – Peaceful and adds vertical movement to the tank.
• 4. Cleaner Shrimp (Lysmata amboinensis) – Helps with tank cleaning and adds activity to the tank.
• 5. Green Star Polyp Coral (Pachyclavularia spp.) – Provides a beautiful and hardy coral option.

These tankmates are good choices because they are generally peaceful, have compatible care requirements, and add visual interest to the tank.

Other Common Names:

The Cubicus Boxfish is also known as the Yellow Boxfish or the Polka Dot Boxfish.

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Popular Questions and Answers:

Q: Are Cubicus Boxfish suitable for beginner aquarists?

A: While Cubicus Boxfish are not the most challenging species to keep, they require moderate care and attention. It is recommended for aquarists with some experience in maintaining saltwater aquariums.

Q: Can Cubicus Boxfish change their coloration?

A: Yes, Cubicus Boxfish can change their coloration. Depending on their mood, environment, or stress levels, they may become darker or lighter.

Q: How often should Cubicus Boxfish be fed?

A: Cubicus Boxfish should be fed in small amounts multiple times a day. Feeding them 2-3 times daily is recommended to ensure they receive enough nutrition.

Q: Do Cubicus Boxfish require a specialized filtration system?

A: While Cubicus Boxfish do not have specific filtration requirements, a well-maintained protein skimmer and a quality biological filtration system benefit their overall health and water quality.

Q: Can Cubicus Boxfish be kept in a reef tank with stony corals?

A: Cubicus Boxfish can generally be kept in a reef tank with stony corals. However, caution should be exercised as they may nip at the polyps of certain corals. Monitoring their behavior closely and providing ample hiding spots for the corals is recommended.