Description
Red Jawfish – Opistognathus rufilineatus
Overview:
The Red Jawfish is a striking burrowing fish known for its elongated body, vibrant red jawline, and large eyes. It spends most of its time hovering near its sand burrow, quickly retreating when threatened. This species is admired for its interesting behavior, mouth-brooding males, and beautiful coloration, making it a favorite among marine aquarists.
Origin:
Native to the Western Atlantic, primarily in the Caribbean and Gulf of Mexico, inhabiting sandy slopes and rubble areas near reefs.
Feeding:
Carnivorous – feeds on zooplankton, small crustaceans, and other tiny invertebrates. In captivity, it readily accepts frozen mysis shrimp, brine shrimp, finely chopped seafood, and high-quality sinking pellets. Frequent small feedings are recommended.
Tank Mates:
Peaceful and reef-safe, best housed with other non-aggressive fish. Avoid large or boisterous tankmates that may outcompete it for food or disturb its burrow.
Aggression:
Low. Territorial around its own burrow but non-aggressive toward other fish.
Experience Level:
Intermediate. Requires a deep sandy substrate (2–4 inches) for burrow construction and a secure lid, as it may jump when startled.
Water Parameters:
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Temperature: 74–78°F (23–26°C)
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pH: 8.1–8.4
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Salinity: 1.020–1.025
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Minimum Tank Size: 30 gallons
The Red Jawfish (Opistognathus rufilineatus) is a peaceful, fascinating burrower that adds both behavioral interest and visual appeal to sandy reef aquariums. Its red jawline and hovering antics make it a standout in any marine setup.
