Redtail Botia (Yasuhikotakia modesta) Care Guide
Yasuhikotakia modesta, the blue or redtail botia, is a robust Mekong loach with a bluish body and red fins that needs a large tank and a group.
Compiled by Aquairi from published sources · Published · Updated
Overview
The Redtail Botia (Yasuhikotakia modesta), also called the blue botia, is a robust botiid loach with a bluish-grey body and red, orange or rarely yellow fins. It is active and social, forming hierarchies within groups, and like its relatives it produces audible clicking sounds. Milder in temperament than some of its relatives, it can still go through aggressive phases and may nip fins.
Taxonomy
- Family: Botiidae
- Genus: Yasuhikotakia
- Scientific name: Yasuhikotakia modesta
- Common synonyms: Botia modesta, Botia rubripinnis
Habitat
The species is widespread in eastern and central Indochina, mainly in the Mekong basin (including Tonlé Sap) and the Chao Phraya, Bang Pakong and Mae Klong systems of Thailand. It favours flowing waters and shelters among submerged rocks and tree roots during the day, foraging over the substrate.
Tank requirements
- Minimum tank volume: 250 L
- Temperature: 24-30 °C (75-86 °F)
- pH: 6.0-7.5
- GH: 5-15 °dGH
- Group size: 5 or more individuals (10+ preferred)
- Lifespan: 8-15 years
Wild fish reach up to about 25 cm, although captive specimens rarely exceed roughly 18 cm; either way a spacious tank with strong filtration is required.
Diet
It is largely carnivorous. The species accepts bloodworm, Tubifex, Artemia and quality dried foods, along with fresh vegetables such as cucumber and spinach. It will prey on aquatic snails but is not an obligate snail eater and should not be relied on for pest control.
Compatibility
Best kept in a group of at least five or six, and preferably ten or more, to spread out social interactions; solitary fish can stress others. It suits active cyprinids and other robust bottom-dwellers. Slow, long-finned tankmates are best avoided as they may be harassed.
Redtail Botia (Yasuhikotakia modesta) Breeding Guide
Overview
The redtail botia, Yasuhikotakia modesta, is a robust botiid loach of the Mekong region. Like most botiids it is a seasonal, migratory spawner in nature, and Seriously Fish reports that its reproduction is tied to large-scale movements between river channels and flooded zones.
Sexing
Seriously Fish notes that sexually mature females are normally fuller-bodied and grow a little larger than males. There are no reliable external markers in young or non-conditioned fish.
Spawning Behavior & Trigger
In the wild, Seriously Fish reports that the species migrates upstream from November to March and downstream from May to July in response to changing water levels, with spawning triggered by the onset of the rainy season as waters rise. Eggs were recorded between February and July with a strong peak in May and June, and eggs and fry are dispersed into flooded zones before juveniles return to permanent channels. This migratory cycle is the principal reason captive reproduction remains unsuccessful.
Common Challenges
The species cannot be expected to spawn in a home aquarium because the seasonal hydrological triggers cannot be reproduced. Commercial supply depends on hormone induction on fish farms rather than natural pairing, so aquarists should source these loaches from the trade rather than attempting to breed them.