Heteromorph analysis, it is wedge-spotted - a small and beautiful fish

Heteromorph parsing or cuneiform spotted (Latin Trigonostigma heteromorpha) is a very common and popular aquarium fish that you will find in almost any pet store.

The parsing fish is small and peaceful, which gets along well with other peaceful species. There are also several variations - albinos, gold, etc.

Living in nature

Cuneiform spotting is widespread in Southeast Asia: Malaysia, Thailand, Singapore, Borneo and Sumatra.
They live in small rivers and streams located in the dense jungle. The water in such rivers is very soft and sour, the color of strong tea from leaves falling into the water.

Rams in flocks live, and feed on various insects.


Among more than fifty types of analysis, heteromorph is the most common and popular in aquariums.

It is caused by its small size (up to 4 cm) and bright color. The body color is copper with a large black spot, a shape resembling a wedge for which it got its name - wedge-shaped.

Life expectancy up to 3-4 years.

Difficulty in content

Unpretentious parsing fish, which is extremely widespread due to its popularity.

Although she prefers soft and acidic water, her popularity has allowed her to adapt to different water parameters.


Analysis of the stomach contents of fish living in nature showed that they feed on various insects: worms, larvae, zooplankton.

In the aquarium, cuneiform spotings eat all types of food, but for more active behavior and bright color, they need to be given live or frozen food regularly: bloodworms, artemia, and tubule.

It is only important to remember that the mouth of the parsing is very small and the feed fractions should be small.

Aquarium Maintenance

Parsing aquarium fish is one of the most unpretentious and adapts to various conditions. To maintain a small aquarium, 40 liters is enough for the flock.

It is better to keep them in water with an acidity of pH 6-7.8 and an average hardness of up to 15 ° dH. However, it tolerates other parameters well. But for breeding already have to try.
Water filtration is desirable, but not very powerful filters can be used if only the water is clean. Be sure to replace up to 25% of water with fresh water on a weekly basis.

The aquarium in which you are going to plant fish should be densely planted with open places for swimming. They prefer species that are found in nature in habitats, such as cryptocoryne or aponogetone, but other species are suitable.

Dense thickets and snags will help wedge-shaped parses to hide in the shade and get away from the stress caused by relocation.

It’s also nice to put floating plants on the surface of the water; in nature, cuneiform spotings live in bodies of water that are densely covered by the crown of tropical trees.

It is important to keep the fish in a flock, as in nature they live that way. The minimum quantity is from 7 pieces.


A very peaceful and accommodating aquarium fish suitable for beginner aquarists.

She does not need to create any special conditions and she marvelously gets along with other types of tetras, for example, with neons, black neons, erythrosonuses and pristelas.

However, when choosing, you need to remember that the analysis of heteromorph is a very small fish and large and predatory fish will consider it as food. For example, you definitely should not keep it with kissing gouras, piranhas and a black pack.

The flock needs to be kept in a pack, it is in it that they will be less susceptible to stress, and more brightly colored. The males surrounded by the females become especially brighter.

Gender differences

The female from the male in the cuneiform spot can be distinguished by a more rounded abdomen. Males are more elegant and more brightly colored.

They are also distinguished by a black spot in the form of a wedge, in males it is sharper at the end, and in females it is rounded.


The cuneiform spotting is one of the species difficult to breed. To achieve successful spawning, you need to carefully select the water parameters.

Manufacturers are better to take by the age of 9-12 months, and feed quality live feed.

It is better to spawn a flock for spawning, where two males per one female. Water must be very soft, ideally no more than 2 dGH.

The water temperature is 26-28 C, and in the spawning grounds there should be bushes of cryptocoryne or other plant species with wide leaves.

Once the spawning aquarium is ready, the flock can be placed in it, but it is better to do this in the evening. In the morning, spawning usually begins, with mating games of males. They stimulate females, fitting those under the broad leaves of plants.

When the female is ready, she turns upside down, under a wide leaf of the plant, and the male joins her.

At this moment, the female lays sticky eggs under the leaf, and the male inseminates them. Spawning lasts for a couple of hours and during this time hundreds of eggs will be laid.

Once spawning is over, fish need to be removed since they can eat fry after hatching.

At a temperature of 28 ° C, the fry will hatch in a day, and within a week will swim. You need to feed it with a very small feed - egg yolk and infusoria.

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