More info
Datasheet
| Minimum Tank Size | 300 litres / 79.25 US gallons |
| Maximum Size | 8.6cm / 3.39inches |
| Temperature | 18°C / 64.40°F - 24°C / 75.20°F |
| Hardness | 2.02dgH / 36ppm - 12.05dgH / 215ppm |
| pH | 6.5-8.0 |
General Description
Opsarius caudiocellatus, commonly known as the caudiocellatus, is a small fish species belonging to the family Cyprinidae. With a maximum size of 8.6cm, this species thrives in well-oxygenated, fast-flowing rivers with substrates of gravel, cobbles, and boulders. It is characterized by a distinct eye-like marking on the caudal fin base.
Aquarium Setup
The ideal tank setup for Opsarius caudiocellatus should mimic a flowing stream or river, featuring a substrate of rocks, sand, fine gravel, and larger boulders. It is recommended to leave ample open swimming space and incorporate driftwood, roots, and branches. Hardy aquatic plants like Microsorum, Bolbitis, or Anubias spp. can be added. Clean water with high oxygen levels and moderate water movement is crucial, requiring the use of external filters, powerheads, and airstones.
Behaviour
Opsarius caudiocellatus is unsuitable for general community tanks due to its specific environmental needs and fast-swimming nature. It tends to intimidate slower or less bold species during feeding times. This species is gregarious but forms shoals with a distinct pecking order, necessitating a group of five or more individuals to prevent aggressive behavior.
Feeding and Diet
In their natural habitat, Opsarius caudiocellatus primarily feeds on aquatic and terrestrial insects, small fish, and benthic invertebrates. In captivity, they can be offered high-quality dried foods supplemented with live or frozen options such as bloodworms, Artemia, earthworms, fruit flies, and crickets.
Reproduction & Dimorphism
Reproduction details for Opsarius caudiocellatus are currently unreported. Adult females are likely larger and thicker than males, especially when gravid. Males may develop breeding tubercules and intensify in color during the breeding season.
Habitat and Distribution
Opsarius caudiocellatus is found in the Salween River system in southern China, Myanmar, and western Thailand, as well as the upper Mekong basin in Yunnan province, China. These fish inhabit fast-flowing rivers with substrates of gravel and boulders, alongside species like Abbottina rivularis and Garra mirofrontis.