Before work crappie

Got up early fri. so I could hit a spot from shore on the way to work theres a light on the rd. that shines over into the water noticed there was minnows flicking in the water near the light figured the should be something else there too . There was ,I got 12 decent 10"-11" crappie there in a little over an hr. Had to work sat. so I did the same thing this time got4 and they quit then noticed why as 3 very aggressive otters came into view they snorted at me not in the least bit scared of me they moved off after 10mins. or so about 10 or 15 mins. after that the crappie started to bite again got 3 more bafore I had to had to work. They bit 2" chart. twister tail on 1/16 jig head.