licorice gourami
| Family | Osphronemidae |
|---|---|
| Genus | Parosphromenus |
| IUCN category (World) | EN |
Introduction
Parosphromenus deissneri, also known as licorice gourami, is a small osphronemid endemic to the island of Bangka (Indonesia). It is described by Bleeker in honor of the physician F. H. Deissner. This species inhabits very small, slow-moving, shaded streams in the heart of the swamp forest.
A conservation and population monitoring program is currently underway through the Parosphromenus Project, which coordinates field data, responsible breeding, and awareness efforts. The project focuses on monitoring, supporting ethical breeding, and promoting traceable lineages. To contribute, prioritize captive-bred fish, avoid wild collection, and maintain the geographic purity of lineages.
Who is it?
Morphology
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Average size4 cm
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Maximum size5 cm
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Longevity5 year
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Mimicryplants
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Average size4 cm
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Maximum size5 cm
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Longevity5 year
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Mimicryplants
How to recognize This fish ?
The species reaches about 3 cm (SL) in length. It has an elongated body and a slender head. In males, the caudal fin bears, just before the edge, a discontinuous pale band formed by a series of small light oval spots.
Sexual dimorphism
Males display sharper contrasts, particularly in the broken subterminal band of the caudal fin and iridescent reflections on the unpaired fins. Females and juveniles are duller; in the genus, the coloration of females remains less distinctive.
Behaviour & Life cycle
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dietcarnivorous
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Sociabilityliving as a couple or in a group
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territorialYes
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Way of livingdiurnal
The licorice gourami is discreet, staying close to vegetated banks where it feeds on microcrustaceans and insect larvae in leaf litter and under the surface film. Belonging to the Anabantidae family, it can utilize atmospheric air, but this air intake is limited and non-essential under normal conditions.
Reproduction
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Reproductionovipare qui pond sur substrat caché
Reproduction takes place in small cavities (under a root, in a crevice). The male attaches the eggs and guards them alone until they hatch. It may produce a few bubbles underwater, but the dominant mode is spawning and guarding the eggs inside a covered shelter.
Harmless species
No known danger to humans.
Origin and distribution
Geographic distribution & Conservation
The licorice gourami is only known from Bangka. Restricted to blackwater peatlands, it is considered endangered by the IUCN as it inhabits an area of about 16 km² and has been observed in only a few localities. It is highly vulnerable to forest destruction and hydrological changes.
The conversion of peat forests into industrial plantations, production forests, and tin mines is the primary threat. On Bangka, the species is mainly reported in already disturbed habitats, indicating a decline in historical sites. The Parosphromenus Project coordinates monitoring, promotes ethical breeding, and encourages the dissemination of traceable lineages. To contribute, prioritize captive-bred fish, avoid wild collection, and maintain the geographic purity of lineages.
Conservation status of populations (IUCN)
What is its habitat?
Natural environment characteristics
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Temperature24 - 30 °C
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pH (acidity)4 - 5
Biotope presentation
The species inhabits very slow to stagnant streams and ditches in forested areas, extremely shallow, cluttered with leaves and roots, within the wooded peat bog. The water is clear but amber-colored due to tannins, extremely soft and very acidic (pH around 4 to 4.5), with an average temperature ranging from 24 to 28 °C, possibly peaking at 30 °C. Plants such as Utricularia sp. (very abundant) and Cryptocoryne bangkaensis are found in its habitat.
Species of the same biotope
Main recommendations for fishkeeping
Deontology
In order to preserve wildlife, if you acquire this animal, it must not be released into the wild. See also, the Fishipedia charter.
Fishipedia supports the practice of responsible and environmentally friendly aquarium keeping. We encourage maintenance if it is motivated by a desire to understand the biological functioning of living things and if it is done with respect for animal life.
We believe that aquaristics is an opening to the discovery of aquatic environments, especially freshwater, and that this knowledge is necessary to better protect and respect these environments. Logically, we refute the compulsive purchase of animals that would not find a sufficient and / or adapted place in the host aquarium.
Our recommendations
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Min volume50 liters
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Population min2
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Temperature24 - 30 °C
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pH (acidity)4 - 5
Characteristics
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Difficulty breedingvery difficult
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Robustnesssensible
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Behaviourslightly aggressive
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Availabilityrare
Recommended equipment from our partners
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Aquarium
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Filtration
General reminders
It is strongly advised to read the complete dedicated file and to get information on the feedbacks of maintenance of the envisaged animal, this to avoid any potential conflict whose end result is generally the death of the individual (or the other inhabitants). It is important not to overload your aquarium to limit pollution. This will make maintenance easier.
In nature, animals are subject to weather conditions and live in waters with variable characteristics. The recommendations offered by our team for aquarium maintenance are a guidance and cannot be assimilated to scientific datas.
General reminder on maintenance datas
Le démarrage d'un aquarium est une partie primordiale pour l'équilibre et le bien-être des poissons. Lorsque l'on met en eau un aquarium, l'eau passe naturellement par un cycle biologique : le cycle de l'azote. Celui-ci dure environ trois semaines. Tous les 2 jours, nous vous conseillons de tester votre eau jusqu'à ce que le taux de nitrite soit à zéro pendant plusieurs jours d'affilée.
Pour accélérer ce cycle, vous pouvez utiliser un activateur de bactéries comme JBL Denitrol. Cette solution riche en bactéries vivantes et enzymes permet une mise en place rapide du cycle de l'azote. Les poissons peuvent alors être introduits plus rapidement.
Il est important de tester l'eau de son aquarium régulièrement pour maintenir un environnement sain pour les poissons et les autres habitants. Les tests d'eau permettent de mesurer les niveaux de différents paramètres tels que le pH, la dureté totale, ainsi que les taux de nitrates, de nitrites et d'ammoniaque.
Pour réaliser ces tests, vous pouvez utiliser des produits d'analyse spécialisés tels que JBL ProScan qui permet de réaliser un diagnostic de l'eau directement via un smartphone. Il existe également des coffrets de tests plus classiques de bandelettes, comme JBL PROAQUATEST.
En cas d’usage de l’eau du robinet, vous pouvez utiliser un conditionneur d’eau de type Biotopol de JBL pour éliminer les substances nocives comme le chlore, le cuivre, le plomb et le zinc. Une eau trop dure ou trop calcaire peut être inadaptée à de nombreuses espèces tropicales d’eau douce. Si nécessaire, vous pouvez la couper avec de l’eau osmosée ou de pluie filtrée afin d’obtenir une dureté plus adaptée aux besoins de vos poissons et de vos plantes. Les conditionneurs d'eau garantissent une meilleure santé aux poissons et une meilleure croissance des plantes.
Chlorine and chloramine are dangerous for the health of animals. Used to disinfect water, these agents are present in significant quantities in tap water. We recommend using an anti-chlorine agent every time you change the water. In addition to chlorine, treatments and medicines sold for aquarium use sometimes contain dangerous heavy metals in high doses.
Specific needs for the licorice gourami
The licorice gourami is a species which lives naturally at a temperature between 24 °C and 30 °C. The licorice gourami is sensitive to abrupt changes in parameters as well as to chemicals. Its acclimation in an aquarium must be done with special care to prevent it from developing diseases or weaknesses. Nitrate levels should remain below 25mg/L. To keep the water clean and unpolluted, plan on changing 20% to 30% of the water volume each month.
The licorice gourami is a species whose maintenance is rather reserved for informed aquarists . It can only be successfully carried out by carrying out a minimum of documentation work. Special husbandry conditions can easily lead to the death of the species.
This species is very rare in the aquarium trade. Instead, it is maintained by knowledgeable aquarists who own and breed individuals from wild origin strains. If you want to get this species, we advise you to contact specialized clubs. }Specimens from long time breeding are a bit easier to breed but you have to respect the particular water parameters.
Cohabitation & Environment
In the wild it occurs at low density, in small, scattered populations within peat-swamp forest streams and ditches. In captivity, provide a species tank that is shallow, very quiet, dimly lit and with near-zero flow. A deep leaf litter layer, roots and tight cavities offer shelter and stabilize water chemistry. Keep the water very soft and acidic, tea-stained by tannins, at 24–26 °C, with small, regular changes. Use a tight lid (it jumps) and keep the air above the surface humid. Avoid active or greedy tankmates; a pair or small, calm group works if many hides are available.
Habitat conservation: conversion of peatlands (plantations, industrial forestry, tin mining) rapidly fragments and degrades blackwater streams; protecting peat swamps and riparian forest is essential.
Acid Water Maintenance
The licorice gourami living naturally in acidic water, generally in "black" or "sieved" water, the implementation of a filtration on peat is ideal for its balance. Adding decaying leaves and alder fruit can significantly improve living conditions by naturally increasing acidity of some water.Tips for feeding
A micro-predator, it prefers small live foods: daphnia, copepods, micro-worms, flightless fruit flies and mosquito larvae. It accepts fine frozen fare (baby brine shrimp, minced copepods) in small portions near hides and the surface film. Dry foods are seldom taken; if used, introduce them slowly mixed with favoured prey. Vary the diet and match prey size to its small mouth.
Feed animals in moderation to maintain good water quality. Meals should be eaten within 2–3 minutes, served in several small portions rather than a single large ration.
Uneaten food quickly decomposes, releasing ammonia, nitrites, and nitrates, which disturb the aquarium’s biological balance.
Make sure each species can access food properly, slower or bottom-dwelling individuals may require targeted feeding.Food recommendations from our partner JBL - Products PRONOVO
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Granules
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Flakes
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Sticks
Reproduction protocol
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egg-laying protectionYes
Set up a dedicated, shallow, shaded, very quiet tank with leaf litter and numerous small cavities (under roots, between bark pieces). Spawning occurs inside a covered hide; after mating the male fixes the eggs inside and guards them alone until hatching. Remove the female if harassed. Keep the water very soft, acidic and stable, with minimal flow. Fry hatch within a few days; start with infusoria/paramoecia, then micro-worms and BBS in tiny amounts, maintaining strict hygiene.
Hybridization risks
In general, it is advised not to mix several species of the same genus or different varieties of the same species, to avoid the risks of hybridization.
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To go further
Sources & Contributions
Participation & Validation
The Fishipedia team and specialist contributors are committed to providing high-quality content. However, although the information comes from scientific sources or testimonials from specialists, the cards may contain inaccuracies.
Benoit Chartrer
Translation
Translation done with the valuable contribution of our translators, who make this information available to a wider audience. We sincerely thank them for their commitment.
Benoit Chartrer
Scientific partners
Species of the same family
Species of the same biotope