Bettas, also known as Siamese Fighting Fish, are capable of holding their breath for an extended period of time due to a special organ called the labyrinth that allows them to absorb oxygen from the air. They can typically go up to 3-5 days without coming up for air; however, this is not recommended as it can cause stress and other health issues. To ensure your betta’s optimum health and well-being, regular water changes should be done every week or two. Additionally, providing adequate hiding places within the tank or bowl will give your fish more security and make them feel safe when they need a break from swimming around.