* The type of fish: Some fish are more common and easier to catch than others.
* The location: Areas with denser fish populations will yield more catches.
* The time of year: Fish availability changes seasonally.
* The size of the penguin: Larger penguins can handle bigger fish and therefore catch more.
However, on average, an emperor penguin can catch around 10-15 fish per dive.
It's important to note that these numbers are estimates, and there's no definitive answer.