Description
Common Boxfish (Ostracion cubicus / Yellow Boxfish)
A truly unique and eye-catching marine species, the Common Boxfish is known for its rigid, box-shaped body and bright yellow juvenile coloration that often develops into a more muted pattern as it matures. Its unusual appearance and calm swimming style make it a standout feature in larger marine aquariums.
Compatibility:
Peaceful but delicate. Best kept with non-aggressive, calm tankmates such as tangs, wrasses, gobies, and clownfish. Avoid aggressive species or fin-nippers, as boxfish can become stressed easily.
Reef Compatibility:
Reef-safe with caution. Generally will not harm corals, but may occasionally nip at small invertebrates or disturb sessile organisms while foraging.
Diet:
Omnivore – feeds on a varied diet including small meaty foods such as mysis shrimp, brine shrimp, chopped seafood, and some algae-based foods. Requires frequent small feedings (2–3 times daily).
Water Parameters:
- Temperature: 24–27°C
- Salinity: 1.023–1.026 SG
- pH: 8.1–8.4
- Minimum Tank Size: 400L
Care Level:
Advanced – sensitive to stress and poor water quality. Requires a mature, stable aquarium with excellent filtration and careful handling during acclimation.
Top Tip:
Avoid sudden movements or stressful tank conditions, as boxfish can release toxins when highly stressed. Provide plenty of open swimming space and a calm environment for best long-term success.
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