The growth of betta fish from tiny eggs to beautiful juvenile fish is a fascinating and rewarding process. Each stage shows quick development, and with proper care, the fry can grow into strong, colorful young bettas by three months.
The journey starts when the male betta builds a bubble nest and guards the fertilized eggs. Betta eggs are very small and usually hatch within 24–48 hours. During this time, the male carefully keeps the eggs in the nest, ensuring they stay safe and oxygenated. Once hatched, the fry remain attached to the nest, absorbing their yolk sacs for nutrition.
After three days, the fry become free-swimming. This is an important stage because they now need external food. Infusoria, baby brine shrimp, and microworms are excellent foods for early growth. Clean water and gentle filtration are also essential because the fry are delicate and can easily be harmed by strong currents.
Between one to four weeks, the fry grow rapidly. Their bodies lengthen, fins begin to form, and they start to look more like miniature bettas. At this stage, frequent water changes and high-quality live food greatly improve survival and growth. By one month, the fry begin showing faint colors.
From five to eight weeks, young bettas become more active. Their colors strengthen, and their finnage becomes more noticeable. Some may start showing early signs of aggression, so separating the more dominant males may be necessary.
By two to three months, the fry enter the juvenile stage. At this age, they develop clear patterns, solid colors, and visible tail shapes like HM, HMPK, or CT depending on genetics. They also start eating larger foods such as pellets.
With proper care, clean water, and a good diet, bettas grow beautifully from eggs to healthy young fish in just three months.
