Top ones are too big for Hyalella. They are a Gammarus and probably G.fasciatus or G. lacustris.
CJ has the clams correct fingernail clams in the family Sphaeriidae. There are three pretty common genera with species in each genus.
Both suggest good water quality. The clams will not live in anoxic sediments (no DO).
Last edited by Bill Cody; 03/01/14 09:45 PM.
