15 Fin-tastic Facts About The Blue Panchax For Kids

The Blue Panchax facts explain how it makes an amazing tank pet.

Don't aquariums with shimmery fish look elegant? The Aplocheilus panchax is a type of killifish found in the freshwater of South Asia. They are popular in Cambodia, Bangladesh, Myanmar, Pakistan, Nepal, India, Sri Lanka, Malaysia, and Indonesia. These killifish are highly adaptable, which is why they make great aquarium fish with minimal feeding needs. The Blue Panchax diet is carnivorous, and they eat foods like insects, mosquito larvae, shrimp, and bloodworms.

The Blue Panchax killifish appearance is pretty distinctive with its thin, elongated silvery body, pointy, upturned snout, and a spot on the head. The Blue Panchax (Aplocheilus panchax) inhabit ponds, canals, fields, mangrove creeks, and ditches that have clear, unpolluted waters rich in plants and vegetation. These fish are known to be peaceful towards several other species of fish but may squabble among themselves without any damage.

Sometimes, the Blue Panchax male shows a darker shade, but otherwise, the two look almost identical. Breeding these fish is easy because they can lay 130-300 eggs per day over a couple of weeks. These killifish lay their eggs in marine plants and mosses, but in an artificial environment and aquariums, synthetic spawning mops are common.

If you want to know more about some fish with pointy teeth, take a look at the Monkfish and Gar.

Blue Panchax

Fact File

What do they prey on?

Insects and larvae

What do they eat?


Average litter size?

130-300 eggs every day for several weeks

How much do they weigh?


How long are they?

3.5 in (9 cm)

How tall are they?


What do they look like?

Luminescent blue body with a white dot on the head

Skin Type


What are their main threats?

Bigger fish

What is their conservation status?

Least Concern

Where you'll find them

Freshwater, lowland, and wetlands


South Asia





Scientific Name

Aplocheilus panchax





Blue Panchax Interesting Facts

What type of animal is a Blue Panchax?

These aquarium killifish (Aplocheilus panchax) are a type of freshwater fish under the family Aplocheilidae.

What class of animal does a Blue Panchax belong to?

The Blue Panchax killifish belongs to the class Actinopterygii.

How many Blue Panchax are there in the world?

With their immense population distribution in the tropical waters of Asia, the exact number of these aquarium killifish in the world is unknown.

Where does a Blue Panchax live?

The Aplocheilus panchax (Blue Panchax aplocheilus) is found in the freshwater of Bangladesh, Sri Lanka, Indonesia, Cambodia, India, Vietnam, Pakistan, Thailand, Nepal, Myanmar, Andaman Islands, Malaysia, and Singapore. Lately, these fish have been introduced to Timor-Leste and the Philippines as well.

What is a Blue Panchax's habitat?

The Blue Panchax (Aplocheilus panchax) inhabits tropical freshwater lowland wetlands with beds of sands, cobbles, or rocks and with minimum dH of up to 15 degrees. This species is sometimes found in brackish coastal environments among mangrove creeks. However, the ideal water pH for these fish to live efficiently is 0.6-0.8. These fish prefer living among plants and choose a range of places, including ponds, canals, estuaries, reservoirs, and ditches. As a popular aquarium fish, this species is fairly easy to manage with a weekly water change of 30% capacity.

Who does Blue Panchax live with?

This fish (Aplocheilus panchax) lives among its own and other similar-size fish. These species also live with fishes that are slow eaters and swimmers and crabs, shrimp, and snails. In a large fish tank, they can be kept medium-size fish, but not small community fish like tetras.

How long does a Blue Panchax live?

Most of the panchax is strong and resilient fish that have a lifespan of four to five years.

How do they reproduce?

These killifish males are polymorphic and mate among a variety of populations. This fish species can breed perennially and under a variety of environments. A healthy spawning pair of this species can lay 130-300 eggs each day over several weeks. The Blue Panchax female lays her eggs in java moss, grass-like plants, and also a spawning mop in a fish tank. The eggs hatch in 9-15 days and cannibalism may occur among the hatchlings due to excessive numbers. In the case of tank fish, you can remove the spawning mop containing the eggs and separate them for the incubation period. Do so to avoid the adults or parent fish from eating the eggs and ensure that the environment in the new tank is the same as the previous one. After the eggs hatch, the fry will have yolk sacs on their bellies which will get absorbed as they grow. These babies' diet requirements are met with nauplii and dry, powdered food. Watch out for cannibalism among the fry because excessive numbers may drive the large ones to hurt the weak.

What is their conservation status?

The Blue Panchax habitat has dense populations of these fish, which is why they are given the Least Concern status.

Blue Panchax Fun Facts

What does Blue Panchax look like?

As its name suggests, the Blue Panchax (Aplocheilus panchax) has iridescent silver-blue scales on its medium-size body, with a bright white spot on its head and a black spot on the dorsal fin. The dorsal fins of this species are set closer to the tail. Their heads are flat and with pointy snouts that are curved upwards. A variety of races show minor color differences with small red, yellow, orange, or green spots on their body and orange and red spots on their fins. Although the males and females look alike, the males are slightly large, more colorful. Males have longer fin lengths as they grow.

The Blue Panchax killifish prefers living in freshwaters filled with vegetation

How cute are they?

These fish come in bright colors with shiny blue highlights and make the perfect addition of cuteness to a home tank.

How do they communicate?

These killifish species of Asia are peaceful in nature and rarely get aggressive unless triggered by other fish. However, it has been found that rival males quarrel among themselves without inflicting damage on the body.

How big is a Blue Panchax?

This species is about three times smaller than the Spotted Garden Eel. To understand their size better, they are almost the same length as the Blue Chromis.

How fast can a Blue Panchax swim?

These peaceful killifish prefer to live with slow eaters and swimmers because they do not swim fast either.

How much does a Blue Panchax weigh?

These aquarium killifish are medium-size, but their weight has not been recorded yet.

What are the male and female names of the species?

The Blue Panchax do not have separate names for their male and female counterparts. However, these fish of Asia have dozens of interchangeable names like Blue-eye killifish, White spot Killi, Lead or lead-head Killifish, Spotted Ricefish, Blue-eye Killi, and Spotted Medaka.

What would you call a baby Blue Panchax?

Newly-hatched killifish from the family Aplocheilidae are called fry just like any other fish in the stage where the yolk-sac is disappearing.

What do they eat?

These species of killifish are natural predators that hide in plants to eat terrestrial or aquatic insects, mosquito larvae, and small fish. In a fish tank, feeding them is simple, and their diet includes bloodworms, frozen fare, and shrimp.

Are they dangerous?

These aquarium killifish are harmless. Although they are peaceful, they are predators and can be dangerous if kept with small community fish in a tank.

Would they make a good pet?

The peaceful Blue Panchax killifish is a common aquarium fish because of its versatility and adaptability. In addition, feeding and caring for them is not difficult or a hassle. They do not require a large fish tank unless there are too many fish. You must also add some entwined plants in the water tank to make it feel like their clear natural habitat.

Did you know...

The are several Blue Panchax adaptations. Some have bright red and orange spots on their fins, while others show small red, orange, green, or yellow spots on their body.

These peaceful tank killifish breed particularly between November to March.

Popular aquarists have had the hobby of keeping these fish since the 1900s, making this species one of the first fish to be kept in an aquarium.

The Blue Panchax fish temperature is around 68-78.8 F (20-26 C).

Some of these highly adaptive fish were found in the water of some hot springs in Singapore.

If kept in poor tank water conditions, these fish are prone to infections from velvet and bacteria.

The diet of these fish consists of mosquito larvae. Now, they are introduced in new areas to control the mosquito population by feeding in the breeding water.

The fish of this species live in waters with a pH level between 6.0-8.0. they can even be found in reservoirs, lowland wetlands, and canals.

Is the Blue Panchax endangered?

No, considering their popularity in nature and an aquarium, this killifish species is far from threatened.

Why is it called a Blue Panchax?

The name Pachpanchax is derived from the Greek word 'pachy' which means thick. This killifish species got the name because of its chubby appearance.

Here at Kidadl, we have carefully created lots of interesting family-friendly animal facts for everyone to discover! Learn more about some other fish from our Bonito Fish and red grouper pages.

You can even occupy yourself at home by coloring in one of our free printable Mangrove Killifish coloring pages.



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