How long can fish go without eating?
Basically, a fish's diet, age, size, and species will determine how long it can survive without food. For example,
fish that eat plant often need to graze or nibble on smaller amounts of food throughout the day to
absorb nutrients, but fish that consume meat, such as those that devour worms or beetles, may be able to coast
after one large meal. While slow or mature fish don't need to replace calories as often, young, active fish
may require more food to retain energy. Some species, such as the Betta fish, may go up to a week without eating.
Angelfish
is one of those that can survive for two weeks. Again, this is not advised and typically only applies for mature, healthy fish.
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