Furry Diary

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Asian Bumblebee Catfish

Pseudomystus siamensis (Regan, 1913)

Also called Leiocassis siamensis (older name)

SpeciesShort profile

From Southeast Asia: the Chao Phraya and Mekong river basins, plus the Maeklong and other river systems of Thailand.12

At a glance the quick version

Length15 to 18 cm12
Sizesmall
Striking bumblebee banding
Hardy across a wide pH range
Interesting nocturnal habits
12

Looks how to spot one

Scaleless catfish body with barbels and a tall, rounded adipose fin

A chunky little bottom-dwelling catfish marked with irregular upright bands of pale yellow over a darker grey or brown base, which gives it its bumblebee look. The adipose fin on the back is high and rounded.12

Coloursyellowish to cream bandsdark grey to brown bands12

Personality what they are like

A shy, night-active catfish that spends the day tucked into a hiding place and comes out after lights off. It likes its own patch of floor and can be territorial toward other bottom-dwellers.2

Daily activity how busy a day looks

Most active at night, cruising the bottom in search of food; daytime is spent resting in cover.2

Grooming and care the hands-on bits

Offer several caves or pipes so it can hide, feed in the evening, and choose tankmates too big to fit in its mouth. Females tend to look stockier, while males show brighter pale markings.2

Home where they are happiest

At least a 120 x 30 cm footprint (around 108 litres) for one fish, larger for a group. Water 20-26 C, pH about 5.8-8.0, hardness roughly 4-25 dH. Provide caves, roots and a soft bottom.21

Food basics what goes in the bowl

A meat eater. In the wild it takes aquatic insect larvae such as dragonfly nymphs; at home it does well on sinking pellets plus prawn, mussel and earthworm pieces.12

Company who they like around

Often kept singly; it suits mid-water companions such as larger barbs and calm cichlids rather than other territorial bottom-dwellers.2

The story where it all began

Described by Regan in 1913, this bagrid catfish was long filed under Leiocassis, a name still common in hobby literature. In its home rivers it is also fished and sold fresh at local markets, and it reaches the aquarium trade from Southeast Asia.21

Fun facts for the dinner table

  1. 1

    In the wild the males guard the eggs.1

  2. 2

    Spawning starts with the rainy season, and young fish show up in nets around August.1

  3. 3

    It was moved out of the genus Leiocassis, yet many books still use the old name.2

  4. 4

    Its high, rounded adipose fin is one of its identifying features.1

Recognised by the official bits

IUCN Red List
Least Concern (assessed 9 March 2011)1
Taxonomy
Described by Regan in 1913; formerly placed in the genus Leiocassis2
Family
Bagridae (bagrid catfishes)1

The care rhythm Furry Diary remembers it for you

A typical home-care rhythm for a Asian Bumblebee Catfish. It is our own starting plan, not a vet's advice, and you can change every line in the app.

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Where this comes from

Every breed page shows where each fact comes from. If we got something wrong, sorry, we are pet people, not a science magazine. Tell us at [email protected] and we will fix it.

  1. FishBase: Pseudomystus siamensis fishbase.seused for distribution, size, water parameters, diet, IUCN, breeding facts
  2. Seriously Fish: Pseudomystus siamensis seriouslyfish.comused for size, tank size, water parameters, diet, behaviour, sexing, taxonomy history

Checked 2026-09-30. Text is written in our own words from these sources.