Hey! I've been using the MarCum LX-9 Digital Sonar/Camera System lately. It's my third underwater fishing camera, but the best one. I can see an observation on one screen from both the camera and sonar. It makes the whole process of fishing more enjoyable. And the quality of the picture is good. Also, you can use it even in winter, which is a significant advantage. I can recommend you also the review here
https://under-the-open-sky.com/best-underwater-fishing-camera and you'll see there the best underwater fishing cameras. There are detailed descriptions of each, pros, cons, and I hope it'll help you.