I know this is an old thread but I thought I would share this. I read on a local fishing forum that some people were collecting shrimp for bait at a lake near my house. I checked with the fish and game regarding re-locating some to my pond and they said take all you want. I went there last weekend and drilled a hole in the ice in a shallow weed bed and when I brought the auger back up, it flooded the ice surface with thousands of them. Gammarus lacustris almost an inch long. I scooped them up and put them in a bucket and put the auger back down the same hole and hoisted up another load. I came home with a 5 gallon bucket, 6" thick on the bottom. I have kept a bunch in a trough that are breeding. I want to see if I can raise some for re-planting in my pond later. I'll post results for anyone interested. Wood