Giant Betta

A much larger fish selected for size, generally with Plakat fins. Fish of about 12 cm are common, and some are reported to reach about 18 cm.

Size is the only real marker. A young Giant can look like a normal Plakat, so buy from a breeder you trust. Names vary between breeders and countries, and a single fish can combine a tail type, a colour and a pattern.

Plakat-type males and females both have short fins, so look for the male’s longer ventral fins, broader fins and stronger colour. Females often show a small white egg spot.

Allow considerably more room than for a standard betta. We list 60 litres, which is a cautious figure of ours. Filtration must cope with larger meals. Use a heater and gentle filtration, with broad leaves or floating plants to rest on. A lid keeps the air above the water warm, which protects the labyrinth organ, and prevents jumping.

Active and curious, and a stronger swimmer than long-finned forms. Males patrol and flare at rivals, including their own reflection.

Best kept alone. Females can also be aggressive to each other, so a group of females is not a safe beginner setup.

Males are highly territorial and will fight other males. A male may also harass a female outside of spawning.

Not recommended for a standard community tank. A male may attack fish with bright colours or flowing fins, including guppies. Calm bottom dwellers can work in larger tanks, but always have a backup plan. Shrimp may be eaten.

Domestic bettas are usually happiest at about 24 to 28 °C. They tolerate a fairly wide range of water, if it is clean and stable.

A carnivore that takes small betta pellets and frozen foods from the surface.

Bettas overeat easily and have small stomachs. A swollen belly usually means too much food.

A bubble nester, bred like any domestic betta. The male builds a floating nest, embraces the female beneath it, then guards the eggs and fry. Remove the female after spawning, and be ready to separate the pair quickly, because the male can seriously injure her. Fry need very small food and warm, humid air above the water.