Channa stewartii Care Guide
Channa stewartii is a dwarf snakehead from north-east India and Nepal, inhabiting hill streams and kept as a cool-tolerant aquarium predator.
Compiled by Aquairi from published sources · Published · Updated
Overview
Channa stewartii, Stewart's snakehead, is a dwarf snakehead described by Playfair in 1867. It is native to Nepal and the Indian states of Arunachal Pradesh, Assam, Manipur, Meghalaya, Nagaland and Tripura, and may also occur in Bangladesh. The species is of little value as a food fish but is common in the aquarium trade.
Taxonomy
- Family: Channidae
- Genus: Channa
- Scientific name: Channa stewartii
- Described by: Playfair, 1867
- Common name: Stewart's Snakehead
Habitat
According to Wikipedia, this freshwater fish mostly inhabits hill streams but can also be found in ponds across north-east India and Nepal. Sources note that it naturally lives at temperatures between roughly 18 and 25 °C and tolerates a wider range than many tropical fish.
Tank requirements
- Minimum tank volume: 400 L
- Maximum size: 25-30 cm
- Temperature: 18-24 °C (64-75 °F)
- pH: 6.5-7.5
- GH: 5-15 °dGH
- Lifespan: 8-12 years
- Provide an air gap below a secured lid; the fish breathes atmospheric air and jumps
Diet
Channa stewartii is a carnivore that takes meaty foods. As a predator it should only share space with fish too large to be swallowed.
Compatibility
The species is aggressive and territorial. It is generally kept singly or, with care, as a conspecific pair, and swims in the middle of the tank. Tankmates smaller than about two-thirds of its length are at risk.
Breeding
Channa stewartii is a mouthbrooder. Breeding is rated advanced for the aquarium.
Channa stewartii Breeding Guide
Overview
Channa stewartii occurs throughout the course of the Brahmaputra River in India and Bangladesh and in the Ganges from southern Nepal eastward, an area of subtropical water temperatures with a warm summer and a colder winter. It reaches a maximum size of about 25 cm. Breeding is achievable for a well-informed keeper, and the species is classified as a cave spawner.
Conditioning
The fish is a carnivore that accepts all common fish foods, including frozen items. Condition prospective breeders well before lowering the temperature to initiate spawning.
Breeding Setup
- Lower the water temperature to about 20 C to initiate breeding
- Form a group from which a pair can arise, then remove the others
- Provide a vegetation-rich layout with hiding places that double as breeding cover
Pairing is unpredictable: simply putting a male and a female together does not necessarily result in a pair, so it is best to grow out a group and let a pair form. Once paired, the remaining fish must be removed, otherwise they will not survive.
Spawning Behavior & Trigger
Spawning is triggered by lowering the temperature to around 20 C, mimicking the cooler season of the natural range. Trial matings take place throughout the year before a successful spawn.
Egg & Fry Care
Brood care is a defining behavioural trait of snakeheads: all species violently guard and defend their eggs and young. The pair can therefore be left to tend the brood in a dedicated, undisturbed tank. Specific egg counts and incubation timing are not given in the consulted source and are omitted.
Common Challenges
The main difficulties are unreliable pairing and the aggression that follows it, which makes removing surplus fish essential. A securely covered tank is required because the species is a jumper.