I have heard that they only like night and full moons etc...I got both of mine in the middle of the day!
They are big fish, they have to eat, they cannot stop eating for a whole season...so the question is, where do they go?? they may move around but they would still have to eat even if they have "shut down".
Sure fish are affected by seasons, tides, moon phases etc but if you know where they are and put a meal right in front of them...the should still go it.
Well that's my thoughts, for what they are worth...