updated 10/15/2008 4:05:49 PM ET 2008-10-15T20:05:49

Mackerel is in but octopus is out. And bluefin tuna, known as the king of sushi for its fatty belly meat, is a definite no-no.

These tips and others on ocean-friendly sushi are now available in pocket guides that are being published this month by three conservation groups. The sustainability guides are the first specifically for sushi, listing fish by their Japanese and English names.

"The sushi industry as a whole is probably pretty far behind the curve," said Trevor Corson, the author of "The Story of Sushi" and a contributor to one of the guides, produced by the Blue Ocean Institute.

Corson said non-sushi fish restaurants are more likely to pay attention to whether their seafood is fished by sustainable methods. In one of the guides, diners at sushi restaurants are encouraged to quiz sushi chefs on where the fish came from and whether it was caught or farmed.

"You often see the information about the fish right on the menu," Corson said about traditional seafood restaurants. "You don't get that at sushi restaurants."

The three guides, published by the East Norwich, N.Y.-based institute, the Monterey Bay Aquarium and the Environmental Defense Fund, are being introduced this week at the French Culinary Institute in Manhattan and on Oct. 22 at San Francisco's Tataki, billed as the only sustainable sushi restaurant in the United States.

In addition, the aquarium is sponsoring a weeklong "virtual sushi party" starting Oct. 22. Participants will be asked to take a pocket guide with them while ordering sushi, then log onto Facebook to compare notes.

The organizations already publish guides to seafood whose supplies are dwindling because of overfishing and other environmental threats. So why a separate guide for sushi?

Corson said some consumers "leave their sustainability conscience at the door when they walk into a sushi restaurant."

And he said sushi offerings may be identified only by their Japanese names, such as toro (tuna belly) or tako (octopus). The sushi pocket guides identify the fish in both English and Japanese.

The Environmental Defense Fund's guide is slightly more focused than the other two on the health of the consumer as well as the health of the oceans, with some items — wild Alaskan salmon, farmed oysters — identified as being "high in heart-healthy omega-3s and low in contaminants."

Bluefin tuna makes the worst choices list of the defense fund's "Sushi Selector" because overfishing has sent the world's bluefin population plummeting by 90 percent in 30 years.

Other worst choices, according to the defense fund: monkfish (ankoh), red snapper (tai) and freshwater eel (unagi). Best choices include U.S. farmed abalone (awabi), albacore tuna from the U.S. or Canada (shiro maguro) and farmed arctic char (iwana).

In New York, Jo-Ann Makovitzky, who owns the high-end Japanese restaurant 15 East with her husband, chef Marco Moreira, said she doesn't serve endangered Chilean sea bass but she does serve bluefin tuna.

"My responsibility as a restaurateur is to bring a safe, healthy, desired product to the guests," Makovitzky said. "Me saying I'm not going to sell tuna anymore, what is that going to do? Other people are just going to end up buying it and our customers are not going to have it."

The guides are online at www.blueocean.org, www.montereybayaquarium.org and www.edf.org.

Copyright 2008 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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