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These look like clouds or cluttered blobs. Large predators are often seen hovering around or underneath these clusters.

This is the "live" data. It shows what is currently directly under the transducer. 0a67281350343620.jpg

To get the most out of your unit, check these three settings on your Lowrance or similar sonar: These look like clouds or cluttered blobs

Most fish appear as "arches." This happens because the fish enters the edge of the sonar cone (distance is long), moves to the center (distance is short), and leaves (distance is long again). and leaves (distance is long again).