Paradise Fish
Macropodus opercularis
Paradise Fish (Macropodus opercularis) — Intermediate care, Aggressive, under Gourami. Minimum tank in the app: 19.8 US gal min; aim for 50–72°F and pH 6–8. Paradise Fish appeal to aquarists looking for a striking, semi-aggressive species that showcases unique personality traits.

Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
East/Southeast Asia
- East & Southeast Asia
Regional colours match the stocking calculator’s origin map.
Paradise Fish Tank Setup
Create a tank layout that balances open swimming space with ample cover using plants and decorations to delineate territories. A substrate that allows for easy planting, moderate water flow, and subdued lighting can promote natural behavior. Aim for a volume of at least 75 liters to provide enough space for territorial behavior without crowding.
What Do Paradise Fishs Eat?
Paradise Fish are omnivorous and can compete for food, particularly if fed quickly sinking pellets or live food. Offering a varied diet that includes both flakes and frozen foods can enhance their health and coloration, but ensure that food reaches all areas of the tank to avoid competition.
Paradise Fish Tank Mates
Ideal tank mates include fish of similar size and temperament, such as medium-sized barbs or rasboras, which can hold their own without being nippy. Avoid slow-moving or long-finned species, as Paradise Fish may nip at their fins. Intraspecies dynamics tend to be less problematic when multiple males are not present simultaneously, as this can trigger aggressive displays.
Are Paradise Fishs Good for Beginners?
We rate this as intermediate. Budget time for testing, maintenance, and watching behaviour if the water looks fine but the fish do not. Aquarists often underestimate the territorial nature of Paradise Fish, leading to aggressive interactions or stress in mixed-species tanks. Failing to provide sufficient cover can exacerbate this issue, and keeping them with incompatible species often results in injury or stress.
Building a community? Run the full list through the stocking calculator before you add anything else.
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