https://teachbesttech.org/best-underwater-cameras/

[Best Underwater Cameras]

The reason is the cameras flash is responsible for the backscatter in your pictures. That's all that snow looking stuff. It's not just from sand or Best Underwater Cameras  silt being kicked up by the diver ahead of you, it's the reflection off tiny suspended particles in the water and it's almost universally present, even in water that appears totally clear. 

https://teachbesttech.org/best-underwater-cameras/