Sunset Gourami
Trichogaster lalius var.
Min Tank Size
40L
Adult Size
7.5 cm
Lifespan
4 years
About
Few fish bring the same warm, fiery glow to a tank as the Sunset Gourami. A selectively bred color variant of the Dwarf Gourami (Trichogaster lalius), this form was developed to amplify the orange and red tones already present in wild males, producing a fish that looks almost backlit under aquarium lighting. Originating from the same South and Southeast Asian rice paddies and slow-moving waterways as the standard Dwarf Gourami, they share identical care requirements and biology.
Their labyrinth organ allows them to breathe air directly from the surface, which is part of why they thrive in low-flow, heavily planted setups. Water parameters should stay soft to moderately hard, with pH between 6.0 and 7.5. They prefer warmer temperatures in the 24 to 28 Celsius range. A well-planted tank with floating plants and subdued lighting brings out their best color and keeps them confident. In sparse, bright tanks they tend to hide and pale out.
Diet is easy to manage. They'll accept quality flake or micro pellets enthusiastically, and small live or frozen foods like daphnia, bloodworm, and brine shrimp are excellent additions. Varied feeding really does make a visible difference in color saturation over time.
They're not boisterous fish. Most of the day they meander through the upper and middle zones, occasionally rising to gulp air. Their personality can seem almost meditative. That calm surface behavior makes them genuinely rewarding centerpiece fish for smaller community tanks.
Browse real tank builds to see how other hobbyists have styled aquascapes around this fish's coloring.
Water Parameters
Temperature
°CpH
GH
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Flow Preference
Keeping multiple Sunset Gourami together
Sunset Gourami is mildly territorial. Small groups can work in spacious tanks with broken sightlines, but expect occasional squabbles.
Compatibility
Sunset Gouramis work well alongside similarly peaceful, small-bodied fish. Good companions include ember tetras, harlequin rasboras, cory catfish, pygmy chain loaches, and small plecos. Avoid any confirmed fin nippers like tiger barbs or serpae tetras since those long, flowing fins are an obvious target. Cherry shrimp can coexist in well-planted tanks but there's always some predation risk, especially on juveniles. Larger, boisterous fish tend to stress them out even without direct aggression. Keep only one male unless the tank is 100 liters or more with heavy planting and multiple sight breaks.
Commonly kept with
Species this one is most often paired withCommonly tried but avoid
Often paired, but shouldn't beCare Notes
The biggest mistake beginners make with this fish is buying a sick one to begin with. Dwarf Gourami Iridovirus is rampant in the trade, particularly in mass-produced variants like this one. Buy from reputable sources, quarantine for at least four weeks, and be aware that DGIV has no cure. The other common failure is keeping two males together in a small tank. Fading color is usually stress or diet related. High current is another issue since these fish come from still water and will exhaust themselves fighting a powerful filter output.
Behavior & Aggression
Aggression in Sunset Gouramis is almost entirely directed at their own kind. Two males in the same tank will clash repeatedly, flaring at each other and escalating to fin damage if neither can establish territory. In smaller tanks there's no refuge, so the subordinate fish takes a beating. With other species they're generally unbothered, though they may occasionally investigate and nudge smaller tankmates out of curiosity rather than hostility. Providing dense planting and visual breaks in the midground reduces stress for all occupants.
Things to Know
- Highly susceptible to Dwarf Gourami Iridovirus (DGIV), a fatal and incurable disease
- Males will fight each other; keep only one male per tank
- Long fins make them easy targets for fin nippers like tiger barbs
- Selectively bred color variant; coloration may fade if stressed or diet is poor
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