I think bass "smarts" need to be taken out of the equation here. A bass is in no sense of the word "smart". Everything it does is an instinctual reaction to its surroundings and situations. It does not think, or decide. Bass do become active before a thunderstorm, almost predicting it, but again it is not attributed to the bass brain power. It's all instinct and environment. Salmon and trout return to the stream or tributary that they were born in to spawn, sometimes hundreds of miles away. It's not because they are "smart", it's because that's how they are wired. It's purely instinctual.