i think my betta is dying

Question
my beta is at the top of his tank and sometimes is laying sideways he is a crown tail and he is puffed out like happy but it seems like he is stuck in the water i feed him and he ate i am not normally feeding him till morning but i thought this would help, he is kind fat ( i also need to know if he lives how to put him on a diet) he seemed fine until like 10 minutes after i turned his light on what do i do??? i turned of the water pump because i figured he might be struggling against it . but i do not know what else to do

Answer
Hello Hana,
What your betta has is SBD, which is Swim Bladder Disease. This occurs normally when you overfeed you fish. Don't feed him for 48 hours, and he should go back to normal. From now on cut back on how much you feed him. Remember, their stomach is the same size as their eye! It may look like a very small amount of food, but they are very small animals! Also, he only needs two or three very small feedings a day. So like 2 pellets in the morning and two at night, or a very small pinch of flaked food, mashed into tiny pieces.
Also, they do not need a bubble or an air pump, so you can leave that off. If he is in anything under one gallon, put him in a larger tank, and make sure you change out his water at least once a week.