Goldfish, a popular freshwater aquarium fish, have a remarkable ability to survive without food for extended periods. As ectothermic animals, their metabolism is directly influenced by the surrounding water temperature, with lower temperatures slowing down their bodily functions and reducing their need for sustenance.
In general, goldfish can go without food for about two weeks at temperatures between 65-72F (18-22C). However, this duration can vary depending on several factors, including the fish’s size, overall health, and water conditions. Smaller goldfish tend to have a faster metabolism and may require feeding more frequently than larger ones. Similarly, goldfish that are ill or stressed may have a reduced appetite and may not be able to go as long without food.