Toxic effects of Deepwater Horizon spill beginning to be seen in Gulf

According to the Louisiana Environmental Action Network and Lower Mississippi Riverkeeping Web site, the BP oil spill's toxic effects are beginning to be seen. A compilation of reports and articles from newspapers and blogs report that scientists are frustrated too by the lack of data about the toxic effects of the spill.
According to EPA's latest analysis of dispersant toxicity released in the document Comparative Toxicity of Eight Oil Dispersant Products on Two Gulf of Mexico Aquatic Test Species , Corexit 9500, the dispersant used by BP, at a concentration of 42 parts per million killed 50 percent of the mysid shrimp tested and at a concentration of 130 parts per million killed 50 percent of the silverside fish tested.