Here are a couple of headlines on the issue since then courtesy of Florida Oil Spill Law:
Oh no it has nothing to do with millions of gallons of oil and dispersant..
Oh, no. Not at all..
Washington's Blog
While the government denies that they are connected with the oil spill, there have been massive fishkills in Louisiana (and see this). Oil can be seen at fishkill sites (and see this), and the EPA has discovered high levels of nickel near the biggest fishkill. There have also been kills of starfish and other sea animals, including whales and dolphins:
And see this.
My favorite Gulf photographer - Julie Dermansky - just sent me the following photos of the third recent fishkill in Plaquemines Parish, Louisiana:
The fishkill shots were taken on September 19th at Bayou Robinson, and the oil shots were taken the same day in Bay Jimmy.
Dermansky notes that the state authorities have subsequently relented, and have conducted at least some minimal testing after all.