• Scientific name: Pseudomystus siamensis
• Synonyms: Leiocassis bicolor, Leiocassis siamensis
• Common name: Asian Bumblebee Catfish, Siamese Catfish
• Group: Catfishes
• Habitat: Asia; Thailand, Laos, Cambodia and Vietnam.
• Size: 15 cm
• Biotope: Inhabits in the lower Mekong river and in the Chao Phraya river, usually among submerged tree roots and other hiding places.
• Social behavior: Predatory, nocturnal catfish, and will eat any small tankmates, that can fit in its mouth. Can be kept with large, peaceful fish in a community tank. It is territorial with other bottom-dwellers, especially with conspecifics.
• Diet: Omnivorous; In nature the species consumes insects and small aquatic crustaceans, but will easily adapts to live, frozen and prepared foods. It should not be fed with beef or chicken meat, as they cannot be properly metabolised by the fish, and can cause organ degeneration.
• Breeding: It has not been bred in aquarium.
• Tank: Minimum 110 litres
• Population: 1 fish for 110 litres
• Decoration: A dimly lit tank or a densely planted aquarium with many hiding places from rocks and roots. Sandy substrate with enough swimming space.
• Temperature: 20-26 °C
• pH: 5.8-7.8
• Hardness: 4-25 NK°
• Lifespan: 4-6 years

Description: As its common name suggest Asian Bumblebee Catfish has a yellowish to dark grey body with irregular vertical bars. Sometimes the whole body is plain dark. The caudal fin is clear to yellowish with or without a single black blotch on each caudal lobe. Pseudomystus siamensis can be confused with the South American bumblebee catfish (Microglanis iheringi), but the Asian Bumblebee Catfish have a matched pair of nasal barbels which originate slightly forward of the eyes and tend to run almost vertically upwards, and they are also larger. The bumblebee catfish will rarely come out at day from its hiding place, except for feeding time.

Females have a stockier body, while the males possess an elongated genital papilla and the light markings on the body are usually more intense. There are no information about their aquarium breeding, but in the wild spawning occurs in the rainy season. Pseudomystus siamensis is a substrate spawner, laying its eggs in tangled roots.