This is a example of a lake called Dayang bunting lake in my home country of Malaysia. It’s like a lake in an island surrounded by water. The origin is like a limestone place collapsed and rainfall collected creating a humongous lake. The surroundings are very high and unlikely to flood over. And there’s like fish in the lake. How did the fish get in there. With no input of water into the lake
In: Biology
Most natural lakes are connected to other waterways at some point in their history, either when they’re initially formed, or during freak weather events that lead to flooding.
Something like a former quarry that slowly fills with rainwater could either have humans release types of fish they want to eat, an inflow of water during a temporary event allowing fish to migrate, etc.
For the specific lake you mentioned, the most common explanation is that people brought fish to the lake and releases them there to catch later.
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