Mystus bleekeri
Day's Mystus
Last revised 2026Edit this page
On this page11 sections
Quick factsEdit
Difficulty4 of 8 measures
- Space
- large tank
- Water
- flexible
- Temp
- flexible
- Diet
- unknown
- Temperament
- peaceful
- Social
- unknown
- Compatibility
- unknown
Other demands
Each of these can raise the rating on its own, whatever the measures above say.
- Hardiness
- unknown
Day's mystus, Mystus bleekeri, is a bagrid catfish from India, Pakistan, Nepal, Bangladesh, Bhutan, Myanmar and Indonesia. It superficially resembles the more common M. vittatus but grows larger, to around 155 mm, and has a much longer adipose fin. Peaceful and gregarious, it suits communities of larger fish, though adults will probably eat small fish, and it is more outgoing in a small group.
Distribution
EditHabitat
Write a noteEditIt inhabits lakes, rivers and other waterways.
Aquarium size
Write a noteEdit120 ∗ 30 ∗ 30 cm48 ∗ 12 ∗ 12 in - ~108 litres~29 US gal.
Maintenance
Write a noteEditThe decor used is not critical but the fish must be provided with some hiding places. You will see it more often if the surface is covered in floating plants to cut down the light reaching the substrate. Water chemistry is relatively unimportant as it can tolerate a wide range of conditions.
Water conditions
EditTemperature: 18 – 26 °C64 – 79 °F. It will probably be happier towards the upper end of this range.
pH: 5.8-8.0. We suggest you aim for a value around 7.0.
Hardness: 3-30°H
These recommendations come from this profile’s own figures. They contain affiliate links, so we may earn a commission.
Diet
Write a noteEditM. bleekeri is an unfussy feeder, and will accept most live, frozen and dried foods. Feed a varied diet to keep the fish in good health and displaying their best colours.
Behaviour and compatibility
Write a noteEditA peaceful and gregarious species but it will probably eat small fish when adult. It makes a good bottom dweller for communities of larger peaceful fish. Maintain it in a small group as it is more outgoing when in the company of conspecifics.
Sexual dimorphism
Write a noteEditMales possess a small genital papilla located just in front of the anal fin. This resembles a single fin ray.
Reproduction
Write a noteEditNot thought to have been achieved in aquaria.
Notes
EditThis species superficially resembles the more common (in the hobby) M. vittatus, but can be distinguished by its larger adult size and much longer adipose fin. It is an ideal peaceful catfish for larger communities and as with many other bagrids, is in our opinion somewhat underrated in the hobby.
Species images · 1
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Also missing: taxonomic authority, etymology.
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