When shopping for fish, I’ve long relied on the Environmental Defense Fund’s Seafood Selector, a must-have guide to choosing sustainable fish and seafood. You can check your choices online or download a printable copy—a great pocket reference for trips to your local natural and organic food store.

The EDF has recently created a new Sushi Selector, which provides sushi-specific information. A downloadable copy is also available, and you can even send a copy to your cell phone.

The Sushi Selector’s content is thorough. Best eco-choices include Canadian uni (sea urchin), surimi (Alaskan pollock) and mirugai (mussels). Worst eco-choices include Maine uni, toro (bluefin, yellowfin and bigeye tuna) and tako (octopus).