Aplocheilidae

Striped Panchax

Aplocheilus lineatus

Scientifically named Aplocheilus lineatus, the Striped Panchax, or Striped Asian Killifish, belongs to the family Aplocheilidae. In its natural habitat, it is quite attractive due to its unique body pattern, but aquarists are particularly drawn to a selective breeding form characterized by a rich golden coloration, as shown in the images below. The combination of a vibrant appearance and undemanding care has ensured the Striped Panchax widespread popularity among aquarium enthusiasts worldwide. This fish can be highly recommended to beginners as a first pet.

Tank
from 80 L (21 gal)
Temperature
22 – 25 °C (72 – 77 °F)
Size in aquarium
10 cm (3.9 in)
Acidity
pH 6–8

Dangerous to small fish

Natural rangeRange on the map
  • Western Ghats area
  • India
  • Sri Lanka

Tank conditions

Plan the tank stocking
Temperature
22 – 25 °C (72 – 77 °F)
Water pH
Slightly acidic (6) – Slightly alkaline (8)
Water dH
Soft (5) – Very hard (20)
Water salinity
very low (up to ~3 g/L)
Size in aquarium
10 cm (3.9 in)
Lifespan
4 years
Temperament
Semi-peaceful dangerous to smaller ones
Toward small fish
a risk to small fish
Required aquarium volume
from 80 L (21 gal)
Lighting
dimmed
Substrate
any, but dark
Water flow
none or stagnant (no flow)
Swimming level
near the surface
Feeding
Meat / protein live, frozen, fresh
Keeping
Mixed solitary / pair / group
Jumping
high a tight-fitting lid is essential
  • Lifespan. A lifespan to expect under good care, not a measured value: it depends heavily on tank volume, water quality and diet — and for selectively bred forms, on their origin as well.
  • Toward small fish. Based on the Predators category in the catalog or the temperament in the species parameters. “A risk to small fish” means the species is not a predator by habit, yet will swallow any fish that fits in its mouth.
  • Required aquarium volume. This is a husbandry recommendation, not a measured value: the volume depends on the keeping mode (mixed (solitary / pair / group)), footprint, decor and tank mates.

Care and keeping

Description

This fish is characterized by a slender, elongated body with a slightly arched back. The head is pointed and slightly flattened on top. The dorsal fin is located closer to the tail, and both the dorsal and caudal fins are rounded, while the anal and pelvic fins are pointed. The fish's natural coloration is a coppery hue, adorned with bright yellow stripes, but aquarists most commonly encounter the golden selective breeding form. There are also variations with a red tail, white fins, and other color modifications.

Habitat

This species is widespread throughout the Indian subcontinent, primarily in India. It inhabits various bodies of water with slow currents or stagnant waters, including brackish environments. Unlike most inhabitants of this region, the Striped Asian Killifish is not prone to migration, preferring to remain within its habitat. In some areas of India and neighboring countries, it is even used for mosquito control. The fish's diet consists of insect larvae, various small aquatic invertebrates, crustaceans, river worms, and small fish. It is important to note that the golden selective breeding form is not found in the wild.

Behavior and Compatibility

The Striped Panchax can coexist with other fish species, provided they are not too small, such as Neon Tetras or Danios. Fish smaller than 5 cm may be perceived as prey. Within their own species, constant skirmishes can also occur, so to maintain harmony in the aquarium, it is recommended to keep only one pair of Striped Panchax.

Care and Maintenance

These fish are quite undemanding but can be messy. They will not pick up food that falls past them or lies on the substrate, which can lead to significant water pollution. Therefore, a productive filter and regular 30% water changes every two weeks are essential. Other important equipment, in addition to the filter, includes an air pump, heater, and lighting system. Installing a lid on the aquarium will help prevent accidental fish jumps. The fish tolerates a slight level of salinity, approximately 2–3 level teaspoons of marine salt per 10 liters of water. For decoration, a dark fine-gravel substrate and subdued lighting are preferred. Plants can be arranged in groups along the side walls of the tank, and bunches of floating plants are also useful for providing additional shade.

Diet

The Striped Panchax is a predator by nature, so its diet should primarily consist of meaty foods. If live food is not available, freeze-dried or frozen options such as daphnia, bloodworms, insect larvae, as well as finely chopped pieces of fish, shrimp, or worms are acceptable.

Breeding and Reproduction

Males can be distinguished from females by their pointed anal and pelvic fins. Spawning is quite possible in a community tank, with Java moss serving as a preferred substrate for egg-laying. The breeding period can last several weeks, during which a pair can lay up to 300 eggs daily. The substrate with eggs should be carefully removed from the community tank and placed in a separate tank with identical water parameters. Fry emerge after 12–14 days; initially, they feed on the remnants of their yolk sac, then switch to specialized foods such as micro-food, infusoria, or Artemia. Regular water changes are important, as leftover food quickly pollutes the environment. Some fry grow faster than others, and upon reaching a certain size, they may prey on their smaller siblings, so it is advisable to separate larger individuals in a timely manner.

Diseases

These fish are known for their hardiness. In a well-balanced aquarium, instances of disease are extremely rare. Health problems may arise from significant deterioration in water quality, contact with sick fish, or physical injuries.

How to choose

When choosing an Aplocheilus lineatus, attention should be paid to the fish's activity and the condition of its skin. Healthy individuals should be active, without visible damage, ulcers, or white film. It is important to ensure there are no signs of emaciation, where the fish's back appears unnaturally pointed. In the store, fish often stay near the surface, which is their natural behavior, but they should react quickly to a person's approach or food. — avoid purchasing individuals with signs of fin damage or unnaturally clamped fins — choose fish with bright, clear coloration, as dullness may indicate stress or poor husbandry — observe their behavior in the tank: healthy fish should not show lethargy or constantly hide at the bottom.

Compatibility

There are no pair reviews for this species yet — check tankmates in the matcher.

All tankmates

Plants and this fish

Matching water does not mean the plant will stay intact.

Frequently asked questions

The essentials: size, tank volume, water parameters and care

How big does Striped Panchax get?

An adult reaches 10 cm in length. Plan the tank around the maximum size: the fish quickly outgrows a cramped setup.

What size aquarium does Striped Panchax need?

The recommended volume is 80 L. A smaller tank speeds up nitrate build-up and raises stress levels.

What water parameters does Striped Panchax need?

Temperature 22–25 °C, pH 6–8, hardness 5–20 dGH. Stability matters more than exact values: sudden swings are harder on the fish than a small deviation from the ideal.

How long does Striped Panchax live?

Around 4 years when kept properly. Lifespan depends directly on tank volume, water quality and a varied diet.

Is Striped Panchax aggressive?

Temperament: semi-peaceful (dangerous to smaller ones). Not a predatory species, but small fish that fit in its mouth will eventually be eaten.

How many Striped Panchax should be kept together?

Recommended setup: mixed (solitary / pair / group). Ignoring this is a common cause of stress and disease.

What does Striped Panchax eat?

Diet type: meat / protein (live, frozen, fresh). Feed small portions that are finished within a couple of minutes — overfeeding does more harm than underfeeding.

What is the scientific name of Striped Panchax?

The scientific name of the species is Aplocheilus lineatus, family Aplocheilidae. It also appears in the literature as: Aplocheilus affinis, Aplocheilus lineolatus, Aplocheilus rubropictus.

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Other scientific names and conservation status

Other scientific names
Aplocheilus affinis, Aplocheilus lineolatus, Aplocheilus rubropictus, Aplocheilus vittatus, Aplochilus lineatus, Haplocheilus lineatus
Categories
Killifish
Conservation status
Least concernLC