Polka Dot Loach (Botia kubotai)

Botia kubotai is native to the Salween (Thanlwin) River system in Myanmar, where it inhabits fast-flowing, well-oxygenated rivers and streams with rocky substrate. It was named in honor of Precha Kubota, a Thai ornamental fish dealer who contributed to its introduction to the hobby.

The body is pale cream to yellowish-white, densely marked with irregular dark brown to black spots of varying sizes across the entire body and fins. The spot pattern is distinctive and variable between individuals — some resemble polka dots, others create a more marbled or reticular pattern. This pattern makes it immediately recognizable among the Botia loach group.

Like all Botia species, the Polka Dot Loach possesses a bifurcate suborbital spine beneath each eye that can be erected as a defensive mechanism. This spine can entangle in fine-mesh nets — use soft mesh or container-style catching when netting.

In the aquarium, Polka Dot Loaches are active, social, and entertaining — they engage in playful chasing, pile sleeping in groups, and constant exploration. They are efficient snail hunters, consuming pest snails (Ramshorn, Pond snails) through the substrate. However, they will also consume desired snail species, so consider compatibility with other invertebrates before adding them.

Polka Dot Loaches prefer clean, well-oxygenated, slightly acidic to neutral water: pH 6.5–7.5, hardness 5–12 dGH, and temperatures 22–27°C. Good filtration, surface agitation, and water movement are important — they are adapted to flowing river conditions.

A minimum 120-liter aquarium suits a group of 4–6. Provide smooth rocks, driftwood, smooth caves, and fine sand or smooth gravel substrate — their barbels are sensitive to sharp substrate. Dense plantings provide cover and enrichment. Ensure no sharp edges in decor that could trap their suborbital spines.

Feed a varied omnivorous diet: sinking loach pellets, algae wafers, sinking cichlid wafers, and live or frozen bloodworms, tubifex, and brine shrimp. They enthusiastically consume pest snails. Feed at night or in dim light when most active.

Polka Dot Loaches are peaceful with most community species but will consume small snails and may occasionally harass very small fish when group numbers are insufficient. Compatible with medium tetras, barbs, corydoras, rainbowfish, and similar species. Keep in groups of at least 4–6 to prevent individual stress.

Use only soft mesh or container nets for capture — hard nets entangle their suborbital spines. Weekly water changes of 25–30% maintain water quality.