Black Kuhli Loach Care Guide - Setup, Feeding & Breeding

The Black Kuhli Loach, Pangio oblonga, is a slender, eel-shaped loach with a remarkably dark brown to nearly black body. Its smooth appearance and small, low-set fins give it a distinctive worm-like profile, while tiny barbels around the mouth help it investigate food and surfaces on the bottom.

Black Kuhli Loaches are native to Southeast Asia, particularly the island of Sumatra in Indonesia. They inhabit slow-moving and still freshwater environments associated with forest streams, peat swamps and blackwater habitats.

A group of Black Kuhli Loaches should have at least 60 litres, with a base of approximately 60 by 30 cm or larger; a longer footprint is more useful than extra height. Use soft sand or very smooth fine gravel so they can burrow without damaging their delicate bodies, along with driftwood, rounded rocks, leaf litter, caves and dense plants that provide shaded retreats. A tightly fitted lid is advisable because these loaches can slip through surprisingly small openings.

Up to 10 cm (4 in) in adult length; females are generally slightly larger and fuller-bodied than males.

They are omnivorous scavengers that feed on sinking foods, insect larvae, small worms, crustaceans and organic material in nature. Offer a varied diet of quality sinking tablets or pellets, frozen or live bloodworms, brine shrimp, daphnia and other suitably sized foods, making sure food reaches the substrate after the aquarium lights go out.

Black Kuhli Loaches are peaceful community fish and can be kept with small rasboras, tetras, danios, peaceful gouramis, livebearers and other non-aggressive bottom dwellers. Suitable companions include harlequin rasboras, ember tetras, celestial pearl danios, honey gouramis and small peaceful Corydoras. Avoid large, boisterous or predatory fish, fin-nippers and aggressive bottom-dwellers that may outcompete or injure them.

Black Kuhli Loaches are rarely bred in home aquariums, although spawning has been achieved in mature, well-established setups. A group may scatter eggs among dense plants, fine-leaved vegetation or floating roots after conditioning with plentiful live or frozen foods and a gentle change to soft, slightly acidic water. The tiny eggs should be protected from adult fish, and the fry require very small foods such as infusoria before they can accept newly hatched brine shrimp.

Females are usually broader through the abdomen, particularly when carrying eggs. Males tend to be slimmer, and their pectoral fins may appear somewhat more robust, although sex differences are subtle outside breeding condition.