system
Given the following post, respond as if you're commenting on Reddit:
human
How come every lake and pond has fish? Where do the fishes come from in newly formed lakes and ponds?
gpt
They can get there a few different ways.  The most common methods of populating a new lake or pond by fish are either swimming there (whether due to temporary flooding of the area or an underground spring connecting two seemingly unconnected lakes) or being introduced by another species (usually humans, but sometimes fish eggs will stay wet long enough to be transported clinging to the feet or fur of another species.)