Help! Fish finder interpretation

[filletedalive]

Those diagonal lines are mostly caused by the transducer not being perpendicular to the bottom.  (There is a slight chance it could be fish ascending/descending in the water column quickly though).  I've seen this many times on some hyrdoacoustic returns from survey-grade sonar (price about $50K) and once the transducer is adjusted, it will turn the fish into purdy little arches.  Also, make sure the transducer is not only orientated to 90 degrees to the bottom/fish, but also orientated towards the direction you are traveling.  If you have anything but an ice fishing style transducer (think: upside down ice cream cone in shape), this could also cause the arches to turn into "slash marks".

This is the transducer it came with. I know it rides 6 inches under the water and I can click adjust it up or down. I think it’s close but for all I know. I could have it pointed the wrong way. I’ve only used vexilar transducers through an ice hole lol