More info
Datasheet
| Minimum Tank Size | 90 litres / 23.78 US gallons |
| Maximum Size | 6.0cm / 2.36inches |
| Temperature | 20°C / 68.00°F - 24°C / 75.20°F |
| Hardness | 1.01dgH / 18ppm - 10.03dgH / 179ppm |
| pH | 6.0-7.5 |
Behaviour
In terms of behaviour, Sewellia spp. are dominant within the 'sucker belly' group of loaches but are not typically aggressive towards dissimilar-looking fishes. Potential tankmates include small, pelagic cyprinids such as Tanichthys, Danio, Devario, and Rasbora, as well as stream-dwelling gobies and rheophilic catfishes. Sewellia spp. are territorial to some extent, with dominance typically related to gender, where males are usually dominant. Group dynamics are crucial for reducing the likelihood of subdominant individuals being singled out, especially in larger, well-structured aquaria where space is not limited. Dominance battles often involve belly-to-belly stances with entertaining displays.
Feeding and Diet
Sewellia spp.'s natural diet primarily consists of benthic algae and associated micro-organisms, with occasional intake of insect larvae. Home-made foods tailored with fresh vegetables and Spirulina are beneficial. Providing a mature aquarium with algae-covered rocks is essential for long-term success. Special care may be needed for emaciated gastromyzontids, ensuring a constant source of suitable foods to aid in recovery.
Reproduction & Dimorphism
Bred successfully in aquaria, Sewellia spp. require a mature substrate for breeding, with gravel providing refuge for fry. Spawning can be triggered by temperature changes and courtship behaviors involve circling and chasing. Identifying sexes is easier with females having broader bodies and continuous snouts, while males are slimmer with squarer snouts. Males exhibit soft tubercules on pectoral fins and head surfaces when sexually mature.
Habitat and Distribution
Found in shallow, fast-flowing waters with abundant biofilm development, Sewellia spp. prefers clear, oxygenated habitats without aquatic plants. Native to central Vietnam, these loaches are often collected from the Hue province for the aquarium trade. Loaches from similar habitats include various Annamia, Balitora, Homaloptera, and other Sewellia spp.