Gulf Oil spill ... Riki Ott is a marine biologist and author of Not One Drop: Betrayal and Courage in the Wake of the Exxon Valdez Oil Spill.

Fishgrease is a petroleum exploration expert who posts at DailyKos (Booming School). His diaries about the ineffectiveness of British Petroleum's attempts at cleanup and control have been picked up by The Rachel Maddow Show.