Pseudomystus Siamensis

Datasheet

General Description

The Asian Bumblebee Catfish, scientifically known as Pseudomystus Siamensis, was previously categorized under the genus Leiocassis and is frequently still referred to as such in the available literature. Within the present genus Pseudomystus, numerous similarly patterned species exist, some of which might be mistakenly imported and traded as P. siamensis. Notably, distinguishing features include its characteristic "bumblebee" patterning and a distinct pair of nasal barbels situated just in front of the eyes. Unlike its congener, P. stenomus, which lacks this unique patterning, the Asian Bumblebee Catfish can also be easily differentiated from the South American Pimelodid "bumblebee" catfish.

Aquarium Setup

To accommodate the Asian Bumblebee Catfish in a home aquarium, a minimum tank size of 108 liters is recommended. Since these catfish are nocturnal and tend to be reclusive, it is optimal to maintain a dimly lit tank. Providing ample hiding spots using items such as turned over flowerpots, plastic piping, and driftwood is advised. Although not mandatory, plants can be beneficial in reducing the light intensity reaching the tank bottom and offering additional coverage. For optimal territorial organization in a multi-species or species group setup, arrange the tank decor to establish distinct territories. Ensure that the heater is positioned to prevent the fish from resting underneath, as the Asian Bumblebee Catfish is scaleless and susceptible to burns.

Behaviour

In its natural habitat, the Asian Bumblebee Catfish displays predatory tendencies, consuming smaller tankmates that it perceives as prey. However, it can coexist safely with larger species that inhabit different tank areas, such as medium to large-sized cyprinids, characins, and peaceful cichlids. Notably, these catfish are territorial towards other bottom-dwellers, particularly conspecifics, and should only be housed with such species in a suitably sized tank with adequate hiding spots and broken lines of sight.

Feeding and Diet

Although inherently predatory, the Asian Bumblebee Catfish typically adapts well to dead foods in captivity. They have a penchant for meaty items like prawns, mussels, cockles, lancefish, or earthworms and can also accept dried sinking foods. Initially, individuals may only feed after lights out, necessitating adjusted feeding times. It is crucial to avoid feeding mammal meats like beef heart or chicken, as they contain lipids that the fish struggles to metabolize efficiently, leading to fat accumulation and potential organ damage. Furthermore, refraining from feeder fish like livebearers can mitigate the risks associated with disease introduction.

Reproduction & Dimorphism

Reproduction behaviors of the Asian Bumblebee Catfish remain unreported in the hobby, although spawning is documented to occur at the onset of the wet season in its natural environment. Sexual dimorphism is observable, with females typically exhibiting a more robust physique than males. Males showcase a prominent, elongated genital papilla, while the light markings on their bodies are usually more pronounced compared to females.

Habitat and Distribution

In the wild, the Asian Bumblebee Catfish primarily inhabits sluggish streams and tributaries, seeking refuge among submerged tree roots and other sheltering structures during daylight hours. It emerges during the night for feeding activities. This species is native to the lower Mekong River that runs through Thailand, Laos, Cambodia, and Vietnam, with sightings also recorded in the Chao Phraya River in Thailand.