The Sumatra Tiger Fish, also known as Datnioides pulcher, is a striking freshwater fish species native to Southeast Asia, particularly found in rivers and streams of Sumatra, Indonesia. Here's some information about its lifestyle and care:

1. Appearance:

   • The Sumatra Tiger Fish has a distinctive appearance characterized by its elongated body, prominent head, and large mouth. Its body is typically silver or gray with prominent black stripes running horizontally along its sides, resembling the patterning of a tiger, hence its common name.
   • Juveniles may display more intense colors and patterns, which may fade slightly as they mature. However, they still retain their characteristic striped pattern.

2. Size:

   • Sumatra Tiger Fish can grow relatively large compared to many other freshwater species. They typically reach lengths of 12 to 18 inches (30 to 45 centimeters) in captivity, although some individuals may grow larger under optimal conditions.

3. Temperament:

   • Sumatra Tiger Fish are predatory by nature and can be aggressive towards smaller tank mates. They are best kept in species-specific aquariums or with larger, robust fish species that can hold their own against the Tiger Fish's aggression.
   • Despite their predatory behavior, they are generally not aggressive towards conspecifics (other Sumatra Tiger Fish) and can be kept in groups if the tank size allows for it.

4. Tank Requirements:

   • Due to their large size and predatory nature, Sumatra Tiger Fish require spacious aquariums with plenty of swimming space. A tank size of at least 100 gallons is recommended for a single adult Tiger Fish, with larger tanks needed for multiple individuals.
   • Provide ample hiding spots such as caves, driftwood, and large rocks to mimic their natural habitat. They prefer subdued lighting and appreciate the presence of floating plants or tall vegetation to create shaded areas.

5. Water Parameters:

   • Sumatra Tiger Fish prefer slightly acidic to neutral water conditions. Maintain a temperature range of 75°F to 82°F (24°C to 28°C) and a pH range of 6.0 to 7.5.
   • Ensure the aquarium is well-filtered and properly aerated, as Tiger Fish are sensitive to poor water quality.

6. Diet:

   • Sumatra Tiger Fish are carnivorous predators and primarily feed on live foods such as small fish, crustaceans, and insects in the wild. In captivity, offer them a varied diet consisting of live or frozen foods such as feeder fish, shrimp, crickets, and earthworms.
   • They may also accept high-quality carnivore pellets or sinking pellets, but live or frozen foods should form the bulk of their diet to ensure they receive the necessary nutrients.

7. Compatibility:

   • Sumatra Tiger Fish are not suitable for community aquariums due to their predatory nature and potential aggression towards smaller fish species. They are best kept with larger, robust tank mates that can withstand their aggression.
   • Avoid keeping them with slow-moving or timid fish species that may become targets for aggression or predation.

Sumatra Tiger Fish are fascinating and visually striking fish that can make impressive inhabitants of large, species-specific aquariums. With proper care and consideration of their specific requirements, they can thrive and become captivating focal points in a well-maintained aquarium.