Blue Spot Jawfish - Opistognathus rosenblatti
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The Blue Spot Jawfish (Opistognathus rosenblatti) is a small and fascinating burrowing reef fish, prized for its vibrant blue spots and interesting sand-dwelling behavior. Peaceful and secretive, this species adds unique activity to the lower regions of reef aquariums.
Common Name: Blue Spot Jawfish
Scientific Name: Opistognathus rosenblatti
Family: Opistognathidae
Size: Up to 3 inches (7.5 cm)
Temperament: Peaceful
Difficulty: Moderate
Reef Safe: Yes
Native Region: Found throughout the Eastern Pacific, including the coasts of Panama and Colombia, typically inhabiting sandy or rubble substrates near reef edges.
Tank Size: Minimum of 30 gallons
Temperature: 74–80°F (23–27°C)
pH: 8.0–8.4
Salinity: 1.023–1.025
Substrate/Decor: Deep sand bed for burrowing; provide live rock for shelter and territories, and avoid strong currents.
• Burrowing Behavior: Requires a deep sand bed (at least 3–4 inches) to construct and maintain burrows.
• Diet: Carnivorous—feeds on small frozen or live meaty foods like brine shrimp, mysis, and finely chopped seafood.
• Behavior: Peaceful and shy; may retreat into burrows when stressed or disturbed.
• Tankmates: Compatible with most peaceful reef fish; avoid aggressive or large predatory species.