Ompok Bimaculatus

Datasheet

General Description

The Butter Catfish, also known as the twospot glass catfish, is a seldom-seen species in the aquarium trade, characterized by its two distinctive spots. Belonging to the family Siluridae, this species, scientifically named Ompok Bimaculatus, displays clear morphological variations among populations, possibly indicating multiple distinct species under the current classification. Variants like the xanthic and albino forms are occasionally found, particularly in Southeast Asia. In its natural habitats, it is esteemed as a source of food, both fresh and smoked.

Aquarium Setup

With a minimum tank size requirement of 680 liters, the Butter Catfish necessitates ample open swimming areas and appropriately sized hiding spots. While aquatic plants may not be suitable due to the fish's size and movement, thick plastic piping serves as adequate shelter. Filtration should be robust to manage the fish's messy eating habits and waste production, with regular water changes essential to maintain water quality. A degree of water movement is favored, and a pH range of 6.0-8.0, water hardness of 4-28°dH, and a temperature of 20-26°C are recommended (see table).

Behaviour

Considered relatively peaceful and shy given its size, the Butter Catfish may prey on smaller fish that can fit into its mouth, supported by its mouthful of sharp teeth. Suitable tankmates include medium to large cyprinids, characins, equivalently sized Asian or South American catfish, and larger cichlids. Its behavior suggests a preference for peaceable cohabitation with fish of similar proportions.

Feeding and Diet

The Butter Catfish demonstrates a versatile palate, accepting a variety of live, frozen, and dried foods. Larger specimens benefit from offerings like earthworms, prawn and mussel pieces, along with dried pellets. Its adaptable diet contributes to its overall hardiness in captive environments.

Reproduction & Dimorphism

In captivity, reproduction of the Butter Catfish has been accomplished through the use of hormone injections. Sexual dimorphism is apparent, with males featuring a serrated edge on the pectoral spine, absent in females. Further differentiation is seen in mature females, who exhibit a thicker body compared to males.

Habitat and Distribution

Displaying a broad distribution across countries like Afghanistan, India, Indonesia, and China, the Butter Catfish occupies various habitats ranging from slow-moving, murky streams to canals and flowing rivers. During the wet season, these fish tend to migrate to flooded areas, showcasing their adaptability to different bioenvironments.