Datnioides Fish Species – Profile, Comparison

Among the many freshwater fish species that captivate aquarium enthusiasts, the Datnioides genus stands out for its tiger-like stripes, predatory nature, and bold appearance. Often referred to as tiger fish (not to be confused with African tiger fish), Datnioides species are prized for their distinctive patterns, strong body structure, and fascinating behavior. In this article, we explore the world of Datnioides fish species, highlighting their characteristics, differences between popular types, and how to care for them properly in captivity.

🐟 About The Datnioides Fish

The Datnioides genus belongs to the family Datnioididae and consists of several species commonly found in Southeast Asia and parts of Oceania. These fish are known for their:

• Laterally compressed, robust bodies

• Bold vertical stripes (like a tiger’s coat)

• Carnivorous diet and territorial behavior

• Preference for slow-moving freshwater environments

They are considered semi-aggressive to aggressive predators, and are best kept by experienced aquarists with large aquariums.

Datnioides species are native to Indonesia, Thailand, Malaysia, Cambodia, and parts of New Guinea. They are typically found in rivers, floodplains, lakes, and brackish waters with submerged roots, driftwood, and calm currents.

Typical environmental conditions:

• Water temperature: 24–30°C (75–86°F)

• pH: 6.0–7.5

• Soft to moderately hard water

• Slow or stagnant waters

These fish are often caught in the wild for the aquarium trade, which has raised conservation concerns for some species.

🔎 Popular Datnioides Fish Species

Here’s a breakdown of the most well-known Datnioides fish species, including their physical differences and aquarium behavior:

1. Datnioides Microlepis

Common name: Indonesian Tiger Fish
Origin: Indonesia 
Max size: 30–35 cm (12–14 inches)

• Famous for its bold, symmetrical black stripes (usually 5–7 bands).

• Often regarded as the most “aesthetically pleasing” of the genus.

• Highly territorial and best housed with similarly sized fish.

• Smooth body texture due to smaller scales (“microlepis” = small-scaled).

2. Datnioides Pulcher

Common name: Siamese Tiger Fish
Origin: Thailand, Cambodia
Max size: 40–50 cm (16–20 inches)

• Larger and more aggressive than D. microlepis.

• Declining population in the wild; considered rare and endangered.

• Bolder stripes and more elongated body shape.

• High demand in the aquarium trade, but limited availability due to export bans from Thailand.

3. Datnioides Campbelli

Common name: New Guinea Tiger Fish
Origin: Southern Papua New Guinea
Max size: 25–30 cm (10–12 inches)

• Less common in the hobby, but growing in popularity.

• Has narrower and more faded striping.

• Slightly more peaceful than its relatives.

• Adaptable to both fresh and brackish water environments.

4. Datnioides Undecimradiatus

Common name: Mekong Tiger Perch
Origin: Mekong River (Laos, Cambodia, Vietnam)
Max size: Up to 45 cm (18 inches)

• Rare in the hobby due to export restrictions and habitat decline.

• Display vertical bands with varying thickness.

• Considered more sensitive to water quality compared to other species.

5. Datnioides Polota

Common name: Silver Tiger Fish
Origin: South Asia, Southeast Asia
Max size: 20–25 cm (8–10 inches)

• More widespread and adaptable.

• Lighter base color and irregular, faded banding.

• Tends to be less aggressive and better suited for community tanks.

• Sometimes mistaken for juvenile D. microlepis due to its similar patterning.

🧪 Behavior and Diet

All Datnioides species are carnivorous ambush predators. In the wild, they feed on:

• Small fish

• Crustaceans

• Aquatic insects

In captivity, they readily accept:

• Live feeder fish (use responsibly)

• Frozen shrimp, bloodworms, and silversides

• Pellets designed for predatory or carnivorous fish

They can be aggressive, particularly toward smaller tankmates. It’s best to house them with similarly sized or non-aggressive species in a large, well-decorated tank.

🛠 Aquarium Care Tips

To keep Datnioides fish healthy and thriving, consider the following setup:

• Tank size: 300+ liters (75+ gallons) for adults

• Temperature: 24–30°C

• pH: 6.5–7.5

• Substrate: Sand or smooth gravel

• Décor: Driftwood, caves, and hiding spots

• Filtration: Strong external filter; weekly water changes

• Tankmates: Avoid small or overly aggressive species

⚠️ Note: Some species may require brackish water. Always check the specific needs of the species you keep.

⚠️ Conservation Note

Several species, particularly D. pulcher and D. undecimradiatus, are facing pressure from:

• Overfishing for the aquarium trade

• Habitat destruction (dam construction, pollution)

• Export restrictions or bans

If you’re planning to purchase a Datnioides fish, look for captive-bred specimens from ethical sources to support conservation.

Below are the selling points of each Datnioides fish species for your reference:

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image source, credit: onlyfins