"It cannot be repeated often enough," says Louisiana marine biologist Jerald Horst.
FONTOVA: From worst disaster to biggest embarrassment →
"I've heard everything but shrimp with two heads," said Jerald Horst, a marine biologist retired from LSU AgCenter who writes books about the Gulf. "I listen respectfully. Reports can be useful but are not proof in themselves of cause and effect."
2 years later, fish sick near BP oil spill site →