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Long-whiskered Catfish

Mystus gulio

An active and hardy brackish catfish, famous for its exceptionally long barbels and constant swimming.

Family
Bagridae
Origin
Asia meridionale e sud-orientale: coste di India, Bangladesh, Myanmar e Malesia, in acque salmastre e fiumi.
Origin
South and Southeast Asia
Tank use
Used in 0 tanks

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Species challenges
Water Temperature

20 °C - 28 °C

pH Value

7 - 8.2

Water type

Freshwater / Brackish

Tank level

Bottom and middle

Adult size

20 cm

Species description

Geographical Origin and Habitat: Coastal estuaries, mudflats, and silt-bottomed rivers of South and Southeast Asia. Highly adaptable.

Taxonomy and Morphology: Family Bagridae. Scaleless, streamlined body. Distinctive for its extremely long maxillary barbels. Grows up to 20 cm.

Social Behavior: Schooling species. Highly active compared to other catfishes. They swim in groups across the bottom and middle columns.

Coloration and Sexual Dimorphism: Plain steel-grey or olive-grey body with a silvery belly. No external sexual dimorphism.

Care, breeding and tankmates

Aquarium Setup: Standard setup with sand substrate and smooth driftwood logs. Open space for active swimming is essential.

Diet and Feeding: Voracious omnivore. Readily eats sinking pellets, earthworms, frozen mysis, and chopped shellfish. Feed in the evening.

Water Quality: Highly adaptable. Lives well in hard freshwater, but light brackish water (SG 1.002-1.005) is preferred for long-term health.

Compatibility and Cohabitation: Keep with large brackish fish. Avoid small species, as they will be eaten during the night.

Aquarium Breeding: Egg scatterer. Undocumented in home aquariums due to their migratory breeding habits in nature.

Risks and Diseases: High jumping risk. Keep the aquarium covered securely. Prone to skin damage from rough substrates.

Fish profile

Temperament
Pacifico ma predatore opportunista di piccoli pesci
Diet
Onnivoro vorace, consuma pellet, cibo congelato, gamberi e detriti
Tank level
Bottom and middle
Minimum group
3
Adult size
20 cm
Minimum tank volume
200 L
GH
n/a
KH
n/a
TDS
n/a
Conductivity
n/a
Feeding frequency
1-2 volte al giorno
Bioload
Medio
Flow
Moderato
Jump risk
Covered tank required
Reproduction
Riproduzione ovipara; non documentata in acquari domestici.
Compatibility & tankmates
Mantenere in piccoli gruppi in vasche spaziose con pesci salmastri grandi. Evitare coinquilini piccoli.

Ecological Estimates & Biological Models

Trophic level
4 ± 0.5 se
Resilience
Medium (1.4 - 4.4 years)
Generation time
1.5 years
Phylogenetic uniqueness (PD50)
0.5
Bayesian Length-Weight
a = 0.0123, b = 2.95
VulnerabilityLow vulnerability (23 / 100)

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.

Related species

Other recommended species with similar care requirements and water parameters.

Last updated: 06/13/2026