Freshwater Stonefish / Freshwater Lion Fish - Batrachomoeus trispinosus
Note, this is a Brackish Water fish that can only be kept in freshwater short-term.
Lion Fish Stone Fish Batrachomoeus Trispinosus 10cm
Overview: The Stonefish, scientifically known as Batrachomoeus trispinosus, is a unique and fascinating addition to any Brackish aquarium. Known for its remarkable camouflage and sedentary lifestyle, this fish resembles a rock or piece of coral, making it a master of disguise. The Stonefish possesses a distinct appearance with a broad, flat head and mottled skin that aids in blending seamlessly with its surroundings.
Origin: This species is native to the coastal waters of the Indo-Pacific region. They are commonly found in shallow, muddy, or sandy environments, where they can easily hide among rocks and coral reefs.
Feeding: The Stonefish is a carnivore, primarily feeding on small fish, crustaceans, and mollusks. In captivity, they can be fed a diet of live or frozen foods such as shrimp, squid, and small fish. It is important to feed them a varied diet to ensure proper nutrition.
Tank Mates: Due to their predatory nature and ability to swallow prey close to their own size, it’s essential to choose tank mates carefully. Suitable companions include larger fish species that are not small enough to be considered prey. Avoid housing them with very small fish or invertebrates.
Aggression: The Stonefish is generally not aggressive towards other fish unless they are small enough to be eaten. Its primary defense mechanism is its camouflage, relying on stillness and blending into the background rather than seeking conflict.
Experience Level: Due to their specific care requirements and potential dangers (they are one of the most venomous fish in the world), Stonefish are recommended for experienced aquarists who are familiar with handling and maintaining venomous species.
Water Parameters:
Temperature: 22-26°C (72-79°F)
pH: 8.1-8.4
Salinity: 1.020-1.025 sg
Ammonia: 0 p
If you have ever wished for a betta with all the beauty but none of the aggression, this betta imbellis is exactly what you need. Often called the peaceful betta or crescent betta, Betta imbellis is a wild-type species that can coexist with other fish — and even other males in the right conditions. For hobbyists, this species is especially rewarding because it thrives in the warm, soft water conditions.
Key Taxonomic Facts
Scientific name: Betta imbellis Ladiges, 1975
Family: Osphronemidae
Common names: Peaceful betta, crescent betta
Maximum size: 5–6 cm
Lifespan: 3–5 years
Origin: Southern Thailand, Peninsular Malaysia
Feeding and Diet
Betta imbellis is a micro-predator in the wild, feeding on insect larvae, small crustaceans and zooplankton. In captivity, offer a varied diet to maintain vibrant colouration and good health.
Recommended Foods
Staple: High-quality micro pellets or betta-specific pellets.
Live foods: Daphnia, baby brine shrimp, microworms, grindal worms. These are easy to culture at home even in a small HDB flat.
Frozen foods: Frozen bloodworms, brine shrimp and daphnia — readily available at local fish shops across Singapore.
Treats: Mosquito larvae collected from outdoor containers (common in tropical Singapore, but ensure no pesticide contamination).
Recommended Water Parameters
Parameter
Ideal Range
Notes
Temperature
24–30 °C
Singapore ambient is usually fine
pH
5.0–7.0
Prefers slightly acidic; PUB tap water sits around 7.0–8.5, so consider buffering down
GH
2–10 dGH
Soft to moderately soft water preferred
KH
1–6 dKH
Lower KH helps maintain a stable acidic pH
Ammonia / Nitrite
0 ppm
Cycle the tank fully before adding fish
Nitrate
< 20 ppm
Weekly water changes keep this in check