The salmon 'alvins' are hiding in the rocks

Day 21, TU 493:
Just checked the salmon, they are hiding in among the rocks at the bottom of the buckets. It's hard to get a photo, I had to get a focused flash light to be able to see them. Water temp has dropped to 40F due to the frost we have had the last 4 days. Stream water level has dropped 6" plus since the high point when we had rain.