Here within the last few weeks me and some of my other Bowfishing buddies have noticed many dead silvers floating and along the banks of the lake we normally fish. By many I mean hundreds to thousands. We have shot some that were acting weird by swimming crooked or almost dead as well. Some have had red bumps on them and some haven't. Any ideas what this could be? It's only silvers also haven't noticed any other fish floating or on the banks.