Butterfly Betta

One body colour that runs into the fins, then ends sharply in a white or see-through outer band, like a butterfly’s wing.

A clean line between the two bands is what breeders look for. Names vary between breeders and countries, and a single fish can combine a tail type, a colour and a pattern.

Males are more colourful, with longer fins. Females are smaller and shorter-finned, and often show a small white egg spot between the ventral fins.

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.

Curious and often responsive to its keeper. 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. Long fins attract nippers, and 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.