Largemouth Bass from extensive aquatic waters like Florida are darker in color to blend in with the shade from cover that they so much have, sometimes almost black. Bass from less aquatic waters like Kentucky Lake have a medium shade as most largemouths are seen in. The very light bass in the picture came from deep water recently. Bass that have been in deep water long enough are very light in color and pattern is difficult to see almost, no shadows were present where they came from, silver (or grey) is most difficult to see from deep water. This is why the color red is red until after about 5-8 ft, then the color of red goes to grey. As for the bass that may have black spots about a half dollar size that can be found anywhere around the body (I have seen the spot on the jaw-line at times), this means that the bass is in prespawn or coming out of prespawn. I have found that in early prespawn the spot is nearer the tail and in later prespawn the spot is nearer the head. Search the internet for more in depth answers.