As I've mentioned and as it's been published before, the use of oil dispersants doesn't actually eliminate any oil, it just moves it into the water column and away from the surface. This is good news for shore birds, nature sanctuaries and wetlands, but bad news for bottom life such as shellfish and corals, and anything that eats them such as fish, manatees and whales.
"...One of the marine treasures of the nation – the coral ecosystems in and around the Florida Keys – are especially vulnerable to this lethal soup. A 2007 study found that both chemical dispersants and dispersed oil are often much more toxic to corals than oil itself. Dispersants and dispersed oil can result in extensive mortality that manifests itself over months and years."
Check out the link at the bottom of the article directing you to pass on letters to your senators aiming to prevent future oil spills and concentrate on clean sources of energy - 60 seconds that can do a world of good!
Full article here (NRDC):