Betta (Siamese Fighting Fish)

The Betta (Siamese Fighting Fish), scientifically known as Betta splendens, belongs to the Anabantoids family group. Adults reach a maximum size of approximately 7 cm and have a compressed body shape with a moderate growth rate. Classified as semi-aggressive, this species primarily occupies the surface and mid-level zones of the aquarium and produces a low level of biological waste.

To thrive, the Betta (Siamese Fighting Fish) requires a freshwater only aquarium with a minimum volume of 19 litres and a tank length of at least 30 cm. Water temperature should be maintained between 24°C and 30°C, with a pH range of 6–8 and a general hardness of 5–20 dGH. A low water flow is preferred.

Due to its specialist needs, the Betta (Siamese Fighting Fish) is best suited for fishkeepers who can provide a carefully planned setup. This species is available in 4 varieties: Male (Long Finned), Male (Plakat / Short Finned), Female, and Giant / King Betta. Each may differ slightly in size, temperament, or care needs, so it is worth checking the specific requirements of the variety you plan to keep.

When setting up an aquarium for the Betta (Siamese Fighting Fish), a low water flow best suits their natural preferences. Because this species occupies the surface and mid-level zones, the aquarium layout should prioritise adequate surface area with floating cover to make them feel secure near the waterline and open swimming space in the centre of the tank for free movement. Useful additions include smooth gravel or rounded substrate to protect their sensitive barbels, dense planting to provide cover, break sightlines, and reduce stress, and floating plants to diffuse overhead light and create shaded areas. Keepers should note that a tight-fitting lid is essential, as this species is a known jumper.

Classified as semi-aggressive, the Betta (Siamese Fighting Fish) is best housed alone, as they do not tolerate others of their kind in confined spaces. When choosing tankmates, ornamental shrimp are not safe companions, conspecific aggression can be intense, especially in smaller tanks, and territorial behaviour may cause issues if hiding spots or floor space are limited. Selecting tankmates that favour different water layers from the surface and mid-level zones can help reduce competition and territorial overlap.

Betta (Siamese Fighting Fish) is best for a fishkeeper who wants a species that can settle into a calmer community setup and can provide someone who understands its individual space requirements. It makes the most sense for a hobbyist who will actually build around its needs, especially plants.

The most common mistake is buying Betta (Siamese Fighting Fish) for looks first and only later discovering how its adult size, behavior, or bioload changes the whole tank plan. Another frequent problem is forcing it into an over-busy community when it would do better with more room or more deliberate tankmate choices.

The Betta (Siamese Fighting Fish) will hunt and eat ornamental shrimp, making it unsuitable for shrimp-focused setups and will eat fry, so breeding efforts in the same tank are unlikely to succeed.