Caught several bigger blues this year (over 50) on the missouri river and noticed they had some parasites attached around the gill areas. I believe these to be freshwater clams larvae. Did some research and found that clams are known to use the fish as hosts to move to new breeding areas. This suggests to me that these large blues are feeding on clams at some time (what times?). Wondering if anyone knows areas on the missouri river that are more favorable to clam populations. Figuring most sandbars, but other areas? Are some bars more prone to sustained populations? Are there better streatches for clam than others? Any help appreciated.