It's impossible to say how long a "regular" fish lives because there are thousands of different fish species, each with its own lifespan.
Here's why it's difficult to generalize:
* Vast diversity: Fish range from tiny gobies to giant whale sharks and live in environments from coral reefs to ocean trenches.
* Lifespan variation: Even within the same species, lifespans vary based on food availability, predation, and environmental conditions.
Examples of fish lifespans:
* Goldfish: 10-20 years in optimal conditions
* Guppies: 1-2 years
* Koi: 50-100 years, sometimes longer
* Atlantic cod: 20-25 years in the wild
* Ocean sunfish: 10-16 years
* Whale shark: Estimated 70-100 years
To learn more about the lifespan of a specific type of fish, you'll need to research that particular species.