Fish arches on a fish finder are a common sight and indicate the presence of fish below your boat. When you see fish arches on the screen, it means that the sonar has detected objects that are moving through the water column. The arch shape is formed because as a fish swims through the sonar beam, it first enters the outer edge of the cone-shaped beam, then reaches the center, and finally exits the other side, creating an arch-like image. To interpret fish arches effectively, consider the following tips: 1. **Size of the Arch**: Larger arches typically indicate bigger fish, while smaller arches may represent smaller fish or baitfish. 2. **Depth**: The depth at which the arches appear can give you an idea of where the fish are located in the water column. 3. **Multiple Arches**: If you see multiple arches stacked on top of each other, it could indicate a school of fish. 4. **Speed**: The speed at which the arches move across the screen can give you an indication of the fish's activity level. Slow-moving arches may suggest inactive or resting fish, while faster-moving arches could indicate feeding or more active fish. Remember, interpreting fish arches takes practice, and factors like boat speed, water conditions, and the sensitivity settings of your fish finder can all affect how the arches appear on the screen.

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Fish Finder Sonar Fish Arches Interpretation