How to Tell How Old a Betta Fish Is: Key Signs and Steps for Aging Your Fish

To determine a betta fish’s age, observe its size and fin appearance. Young bettas (2-3 months) are smaller with short fins. Adult bettas (4-12 months) usually measure 2.5-3 inches and have longer fins. Old bettas (1+ year) show fin wear, faded colors, lower activity levels, or physical deformities. Additionally, observe the color intensity. Younger bettas … Read more