Water and fish samples have been sent to the Alabama Department of Public Health to try and figure out what is causing a fishkill in gulf waters. Preliminary test results show it’s not oil that is killing the fish. Take a walk down Gulf State Pier and you can't help but notice something in the water. Dead fish, lots of them.  "The middle of last week is when we started getting reports of them washing up on the front beach of the state park," says Chief Biologist for the Alabama Department of Conservation Kevin Anson. For about a week now fish, mostly menhaden and a species…