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Blue Lined Grouper Fish

$22499
SKU: w_fish080425.10

Tags:   Groupers Non Reef Safe WYSIWYG Fish

Blue Lined Grouper
(Cephalopholis formosa)
WYSIWYG – Approx. Size: 4.50–5.00 Inches
Maximum Size: Up to 12 Inches

The Blue Lined Grouper is a stunning reef predator known for its striking cobalt blue horizontal stripes contrasting against a rich reddish-brown body. This species exhibits a sleek, elongated profile and captivating coloration that intensifies under aquarium lighting. Native to Indo-Pacific reefs, the Blue Lined Grouper adds both dynamic movement and vibrant color to mature FOWLR and reef aquariums. With proper care, it grows into a beautiful centerpiece fish.

Tank Requirements

Minimum Tank Size: 120 gallons (larger preferred for adults)

Environment: Plenty of rockwork, caves, and crevices for hiding and ambush hunting

Flow: Moderate

Lid: Required — grouper are strong swimmers and can jump

This grouper thrives in stable, mature systems with ample cover to retreat. It benefits from a tank with moderate flow and minimal aggressive tankmates.

Natural Behavior

Blue Lined Groupers are ambush predators that rely on stealth and patience to catch prey. They are generally solitary and can be territorial, especially in smaller tanks. Despite their predatory nature, they exhibit a calm demeanor when well-fed and properly housed.

Diet & Feeding

Carnivorous with a preference for meaty foods:

  • Live or frozen shrimp, silversides, squid, and small fish

  • Chopped seafood such as clam or scallop

  • High-quality frozen carnivore preparations

Feed 3–5 times per week. Avoid overfeeding to maintain water quality and fish health.

Tankmates & Compatibility

Temperament: Semi-aggressive; predatory toward smaller fish and invertebrates

Reef Safe: No — will eat small fish and inverts

Best With: Larger, robust fish such as tangs, large wrasses, and other sizeable groupers

Avoid small or delicate species. Blue Lined Groupers do best in large, species-specific or predator tanks with tankmates too big to be preyed upon.