Edit Opsarius koratensis
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Name
Scientific name
Opsarius koratensis
Described by
Authority Smith, Year 1931, Bracketed
Family
Cyprinidae
Common names
Not recorded
Photograph credits
All 3 credited
Summary
Opsarius koratensis is a cyprinid of the middle and lower Mekong in Thailand, Laos and Cambodia, and the Chao Phraya, Mae Klong and Dong Na…
Size and aquarium
Maximum size
100mm, standard length
Aquarium size
Minimum length 150 cm, Minimum depth 45 cm
Water
Water conditions
Temperature 22–30°C, pH 6–8
Hardness
2–15dGH
Conductivity
Not recorded
Behaviour
Temperament
Not recorded
Social needs
A shoal or group
Community suitability
Not for a community
Where it lives
Countries, regions, rivers and lakes
Cambodia, Laos, Thailand, Vietnam, Chao Phraya, Dong Nai, Mae Klong, Mekong, Mun, Sekong, Xe Bang Fai, Xe Kong
Writing
Etymology
Opsarius: apparently from an Ancient Greek word meaning 'small fish'. koratensis: named for the district of Korat, now normally referred to as Nakhon Ratchasim…
Distribution
Type locality is 'Mun River at Tachang (Ta-Chang), Nakorn-Rajsima, Korat District, eastern Thailand'. The Mun is a tributary of the Mekong River and this speci…
Habitat
Inhabits well-oxygenated, low-to-medium gradient, slow to moderate-flowing rivers and streams with substrates of gravel, cobbles, larger boulders and exposed b…
Aquarium size
Requires a large aquarium with minimum surface area of 150 ∗ 45 cm or equivalent.
Maintenance
The aquarium should ideally be designed to resemble a flowing stream or river with a substrate of variably-sized rocks, sand, fine gravel, and some larger wate…
Water conditions
Temperature: 22 – 30 °C; apparently prefers warmer condistions and in one study was particularly associated with habitats in which water temperature was around…
Diet
Opsarius spp. are predominantly surface-feeders preying on aquatic and terrestrial insects in nature, with some small fishes and benthic invertebrates probably…
Behaviour and compatibility
Unsuitable for the general community due to its environmental requirements, and likely to outcompete or intimidate slow-moving and less bold species at meal ti…
Sexual dimorphism
Adult females are less-brightly-coloured, tend to grow a little larger and are thicker-bodied than males, especially when gravid.
Reproduction
Unreported.
Notes
This species occasionally appears in the ornamental trade. It exhibits some morphological differences when compared with relatives, and genetic evidence recove…
References
References
12 on this profile