Yes, as long as you're managing your expectations. These days, most underwater fishing cameras come with plenty of image enhancement technologies that make it easier to recognize fish even in murky water. The IR lights can be of great help in such situations. Along with that, a good monitor would also be useful, as low resolution and smaller monitors can make watching fish even in clear water challenging. That being said, technology can only go so far. If the water is so stained that you yourself wouldn't be able to see anything down there, don't expect your camera to magically have x-ray vision.