Satellites used for Google Earth imagery do not have sufficient resolution to see fish. Kinda know a bit about this field. Notice the angle of the sun casting shadows...morning sun from the east. Most likely an easterly breeze. Notice trees on east side blocking breeze causing no ripples. Small waves reflecting sunlight. Or, it is Loch Ness progeny:-)
I thought it might be Lily pads or some water plants. That would explain none over the channel on the right of the pic...?????