i was down at local boat dock today just lookin around when i noticed some fish washed up on shore of the river. They were shad! i gathered up all that was there. I noticed when i walked out to end of dock that there were several slowly swimming around. I reached into water and picked them up. Also there were several perch floating or "loligaging" around the area so i picked them up as well. What would cause this? Anyone know if a cold front can put fish into shock?