If a normal healthy person eats too much, do they have breathing problems or other internal problems?Hmmm... But I thought if a fish ate too much it would put pressure on the swim bladders and cause issues
Nature wouldn't do something like that to an animal. Fish and all creatures are opportunistic feeders and eat as much as they can, whenever they can get food. If fish developed swim bladder problems from eating too much, most of the fish would die after feeding.
Swim bladder problems are usually caused by poor genetics (weak fish).