There's a small, one acre lagoon I've been fishing lately where I can literally cover every inch of the water by navigating the banks. It holds quality fish as I've caught a 4 pounder in there and I've also seen an 8 pounder come out of it.
What I find so fascinating is that one day I can go out there and in a two hour period catch 7 or eight bass. But the next day I can go out at that same time of day with the same weather and wind conditions and barely get a bite. Changing up baits, upsizing and downsizing, changing presentations speeds, fishing different depths, none of it made a difference. It's not like this is a big lake where fish can migrate, find cover or structure, and move to different depths. It's just a 7 foot deep lagoon with some nice grass lines along two of its sides.
I do realize there's more to the ecosystem of the lagoon, things like an extra day or two of hot conditions can raise water temperatures, the barometric pressure may have changed, the ever present changing of solunar cycles, and dozens of other factors. But still, when you can cover every inch of the water and not entice more than a few short strikes in a small lagoon with a healthy bass population I do find that fascinating.