Normal adult bettas are usually around 3 inches (7.6 cm) in length. Hold a measuring tape up to your fish's tank and see how long it is. If your betta is less than the average, your betta is most likely a juvenile. It can be hard to measure a betta exactly. In most cases, it will be enough to simply get an estimate by holding up a measuring tape against the glass. Be patient since most healthy bettas do not stay still often. Adult bettas have nice and beautiful flowing fins. If your betta has this characteristic, this is a good sign that it is an adult. If it has tiny fins, then it is either a juvenile or a baby.  Make sure you know the sex of your betta. Female bettas never get long, flowing fins like the males do. Don't confuse normal wear with injuries from diseases. Crowntails naturally have 'torn'- looking fins. In general, young bettas are vibrant and middle-aged bettas are slightly faded. The color of the scales of an older betta will be slightly faded and muted.
تفقد حجم سمكة بيتا. تفقد زعانف سمكتك البيتا. قيم لون سمكتك.