This can cause an increase in anxiety degree and also might cause body organ failing and illness contraction. This is however not recommended because after about 5-6 days a betta fish starts to tap into its reserves and can enter starvation mode. If you’re planning a vacation, try to find someone to keep up with the regular feeding schedule, or use an automatic fish feeder. For How Long Can a Betta Fish Live without Food? These bettas most likely died from several compounded issues, primarily ammonia and nitrite poisoning, but also bloat and swim bladder disorder. Everything I can find says that betta fish can only live about 2 weeks without food. That depends on a lot of different things, but mainly, it’s how healthy the betta is beforehand. This can take even up to one week. It is not advisable to leave your betta fish without food for for too long, but can survive without eating for even a week. A Betta can survive for up to two weeks without food however this is not something we ever recommend doing. https://fishtankadviser.com/how-long-can-a-betta-go-without-food Generally betta fish can endure without food for 2 weeks, yet it needs to not be recommended. My betta fish has refused to eat for the past 7 weeks...how is it possible that he is still alive? That being said, here’s how long the average freshwater fish can go without food: A healthy, grown-up aquarium fish can go from 3 days to 1 whole week, without eating any food. Of course, these bettas often did not live long, and people began to conclude that bettas only live for 1-6 months, instead of the actual 3-5 years that bettas do live. I've tried treating him for different illnesses but nothing works. The betta fish belong to the gourami family and are very rare species as they can survive without food for a very long time than other domestic species. Actually male bettas will not eat during their breeding period and while taking care of their fry. It will be fine but, if you are worried about it not getting any food I suggest auto feeder it runs off of AA batteries and depending how you have your,Betta's place is at it can attach to it or try to hang it just over it as well.You can set it for 1-3 times a day feedings.But just give the Betta's home a good cleaning but, do not take all the water out it needs at least 15% of its … That is since after 5 or 6 days the fish starts to tap into its gets and also can get in hunger. If your fish is not eating, the main cause may be the type of food you are giving it. He is clearly not well, just lays at the bottom of the bowl and barely moves. Some fish species can even live for more than 2 weeks without eating. Bettas are primarily carnivores, feasting on insects in the wild. How long a betta fish can go without food depends a lot on what you are serving as food. 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