How foggy weather makes conditions favourable for fishing?

Question

How foggy weather, which prevails near the meeting point of " Warm Water Current " and " Cold Water Current " , makes conditions favourable for fishing ?

Answer 1

There is somethin' called optimum temperature required for life, breeding,et cetra.
When such a temp. is attained in any place, animals tend to flock there.Hence, fish are no exception!
Clever fishermen make use of this golden opportunity and make "hay"

Answer 2

fishes tend to come to surface during this period which makes the bait easier