It’s a Japanese restaurant owned by a Korean-American chef that’s named after one of the world’s most expensive and endangered fish.

And it’s a place where sharks gather — as in Manny Malhotra, Joe Pavelski and Kent Huskins of the San Jose Sharks hockey team, who circle the ice at HP Pavillion, then come here for a bite to eat.

Executive Chef Jun Chon, opened Bluefin restaurant last October on The Alameda in San Jose, not realizing the name he had chosen was that of a species many environmentalists are urging be declared endangered because it has become so over-fished.

“I have gotten criticized a few times about the name,” Chon says. “I only picked the name because it was simple and easy to remember. It’s the king of fish. I didn’t think about the endangered part.”

It’s a Catch-22 for many sushi chefs these days. So many of the most popular fish used for sushi are over-fished. But so many customers still want to eat those varieties that chefs feel almost obliged to serve them.

Chon says he tries to follow the Monterey Bay Aquarium’s guidelines for sustainable fish, but he believes it would be nearly impossible to adhere to them strictly. As it is, he says he won’t buy unagi from China because of the use of antibiotics. He only purchases certified yellowtail. And while he does buy toro (the fatty, luscious belly flesh of the bluefin tuna), he tries to buy only farm-raised from Spain or Japan. As pricey as it is — $16 for two slices — the restaurant sells two to 10 orders a night.

Chon, 49,  is an unlikely restaurateur — the eldest son of a Korean mother born in Japan who never learned to cook growing up, and who majored in mechanical engineering at the University of California, Berkeley only because his limited English made it difficult to study other courses besides math and science.

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