Thread: Side Imaging Help

This is an image from my Humminbird 899. I can see what I would think would be a ball of shad under my boat with what I thot was crappie off to the right of the boat approx 37ft. I shut the motor down and started fishing over them and quickly found out they were white bass, and man was it fun for about a half hour! My question is... How do I determine what kind of fish im looking at when I find em on my graph? And also, what does crappie look like on these things???!!!