It is sport among black belt sushi eaters here to see just how daring one's palate can be. But even among the squid-chomping, roe-eating and uni-nibbling fans, whale is almost unheard of on the plate. It also happens to be illegal.
Yet with video cameras and tiny microphones, the team behind Sunday's Oscar-winning documentary film The Cove has orchestrated a Hollywood-meets-Greenpeace-style covert operation to ferret out what the authorities say is illegal whale meat at one of this town's most highly regarded sushi destinations.
Their work, undertaken in large part here last week as the filmmakers gathered for the Academy Awards ceremony, was co-ordinated with law enforcement officials, who say they will bring charges against the restaurant, the Hump, for violating federal laws against selling marine mammals.
"We're moving forward rapidly," said Thom Mrozek, a spokesman for the U.S. Attorney's Office for the Central District of California. He declined to say what charges would be brought against the restaurant, but said they could come as early as this week.
In the clash of two Southern California cultures - sushi aficionados and hard-core animal lovers - the animal lovers have thrown a hard punch.
"This isn't just about saving whales," said Louie Psihoyos, the director of The Cove , a documentary that chronicles eco-activist battles with Japanese officials over dolphin hunting. "But about saving the planet."
The sushi sting actually began in October, when the documentary's associate producer and so-called director of clandestine operations, Charles Hambleton, heard from friends in the music industry that a highly rated restaurant known for its sushi, the Hump, was serving whale.
Mr. Hambleton, who has worked as a water safety consultant on Hollywood movies such as Pirates of the Caribbean , created a tiny camera for two animal-activist associates to wear during a monster session of omakase - a sushi meal in which the chef picks all the dishes.
Video of their meal shows the two activists, both vegan, being served what the waitress can be heard calling "whale" - thick pink slices - that they take squeamish bites of before tossing into a zipper storage bag in a purse.
The samples were sent to Scott Baker, a whale expert who is the associate director of the Marine Mammal Institute at Oregon State University. Mr. Baker said DNA testing there revealed that the samples sent to him were from a Sei whale, which are found worldwide and are endangered but are sometimes hunted in the north Pacific Ocean under a controversial Japanese scientific program.
"I've been doing this for years," Mr. Baker said. "I was pretty shocked."
Serving unusual fish imported from Japan is the hallmark of many high-end sushi restaurants here, and whale meat is often found in Japanese markets, Mr. Baker said. But he said he had never heard of it being served in an American restaurant.
Workers at the Hump, which according to its website is named after an aviation slang term for the Himalayas, directed questions to a lawyer.
"We're going to look into the allegations and try to determine what is true," said the lawyer, Gary Lincenberg, in a telephone interview. "Until we have done that, I don't have any other comment."
Mr. Baker contacted the National Oceanic and Atmospheric Administration, a marine conservation unit of the Department of Commerce, which began its own investigation, eventually looping in the U.S. attorney in Los Angeles.
The Cove team - a far-flung band of activists who use filmmaking to highlight environmental causes - knew they would be together in Los Angeles for the Oscars, and so sting operations two and three were hatched. On Feb. 28, Mr. Psihoyos and team members split up between the sushi bar and a restaurant table and ordered sushi and communicated via text message with Mr. Psihoyos, who waited in a car in the parking lot. Mr. Psihoyos served as an electronic envoy between the investigators at the sushi bar, who were witnessing the chopping of fish and whale, and those sitting at a table: "They're eating blowfish!" read one of the text messages. "Toro and sea urchin, nothing exciting," another said. "Whale coming now!"
Next waiters identified a meaty course of whale, known as kujira , at a cost of $60, according to a federal affidavit. (The total bill exceeded $600 for two, with very little sake.) In early March, several federal agents, including one from the Border Patrol and one who speaks Japanese, joined their team. Once again, the chef and wait staff more than once identified the meat as whale, the affidavit said, and it may have been obtained from a Mercedes-Benz parked behind the restaurant.
Armed with a search warrant, federal officials went searching for evidence from the restaurant, including marine mammal parts. e