Different fish have different feeding requirements, but on average most fish can eat twice a day, small doses each feeding. A different food for morning and night is also recommended but not required. Such as flake in the morning and a frozen shrimp in the evening.
You can feed this once or twice a week
Twice a day.
Only when they stink,so the answer would be often.
you feed them every other day to them.
Feed it enough so it doesn't die.
One or twice per day.
You won't need to feed fish as often because it keeps them "full" longer.
Feed them the amount they can consume in about three minutes 2-3 times a day
At least once or twice a day.
What to feed a fish is not dependant on whether it was wild caught or captive raised, you feed a fish based on whether it is a predator, omnivore or herbivore. Though wild fish will more often need fresh foods, instead of prepared. At least when first aquired.
It depends on how big or what kind of fish you have. For example you feed a Betta fish one pinch in the morning and a second pinch at night.
You have to feed a Berta fish 3 pellets in 1 day because I have a betta fish and it eats fine