If you have an environmental toxicolgy, environmental science, or zoology background, and wish to go to the US in December. I know a professor from Southern Illinois University has got funding available and looking for students now. SIU is not a top university, but the professor is really nice. So please be sincere. http://www.aquatictox.com/PDF/Phd%202006.pdf
Thank clement23 and 指向大海 . I have been contacting him for half a year, but I didn't go to his university because his funding is starting at December. By the way, I saw an MS Research Assistantship in fishery and aquatic ecology available Ad in my department bulletin board. If anyone interested can message me.