Wind is caused by differences in air pressure. An offshore breeze is the result of high pressure over land, and low pressure over the water. The high pressure air moves toward the lower pressure...
Either the film was very old before being processed, or it was subjected to high temperature before development (such as being left in direct sunlight or in a hot place such as a car during a summer...
Overfeeding, and not chaning the water enough. That fog is a combination of phosphates and ammonia, which comes from decomposing wasted food and fish waste. You should change about 20% of the water...