How long can a fish go without eating?

The answer to how long a fish can go without eating is highly variable and depends on several factors:

Fish species: Some fish, like catfish, can survive for weeks or even months without food. Others, like trout and salmon, are more active and need to eat more frequently.

Water temperature: Colder water slows down metabolism, allowing fish to survive longer periods without food.

Fish size: Larger fish have more energy reserves and can go longer without eating.

Availability of food: Fish in a natural environment with abundant food may not need to eat as frequently as fish in a tank with limited resources.

Health and age: Healthy, young fish are better equipped to handle periods of starvation than sick or old fish.

Here's a general idea:

* Very short periods (hours to a few days): Goldfish, guppies, and other active, small fish.

* Moderate periods (days to weeks): Most common aquarium fish.

* Long periods (weeks to months): Catfish, carp, and some other species.

It's important to note that:

* Going without food for extended periods can stress fish and weaken their immune system.

* Prolonged starvation can lead to health problems and even death.

If you're keeping fish, it's essential to provide them with a consistent and appropriate diet.

If you have specific questions about a particular fish species or your own fish, consult a veterinarian or experienced aquarist for personalized advice.