寡鳞无须魮 · Checkered Barb

Overview

Black crescent marks on the scales create the checkered appearance of Oliotius oligolepis. This peaceful barb is produced commercially in large numbers, with genuinely wild stock rarely encountered.

Distribution & habitat

It appears native to west-central Sumatra, although the full range remains unclear. The type locality is Lake Maninjau, and additional records concern several lower river basins in North Sumatra. No single locality represents the entire known distribution.

Aquarium setup

Decoration is flexible, but a furnished aquarium generally brings out better color. Plants, floating or overhanging cover, and wood create shelter while leaving room for the group to move.

Diet & feeding

The probable wild diet is mixed, with aquatic invertebrates predominating over smaller amounts of vegetation and debris. Captive fish feed readily. Combine quality flakes or granules with frequent small frozen or live foods to maintain condition.

Behaviour & compatibility

It is usually very peaceful and suits a thoughtfully chosen small-fish community. Keep at least six to ten together to reduce nervousness and encourage male display colors.

Sexual dimorphism

Adult males are noticeably smaller and slimmer, with stronger coloration, particularly in reproductive condition.

Breeding

Eggs are dispersed without guarding. Occasional fry may appear in an established aquarium. For better production, prepare a dim breeding tank with mature water and fine plants or mops, or an egg-protecting mesh or marble layer. Slightly acidic to neutral water near the warmer end of its normal range and gentle aeration are suitable.

Introduce conditioned pairs, or a larger mixed group if room allows. Spawning may follow the next morning. Remove adults afterward. Eggs generally hatch within one to two days, with swimming beginning about another day later. Start the young on microscopic foods before progressing to microworms and nauplii.