But some people wonder if it's safe to eat "raw fish."
First, not all sushi is raw, says Jason Park, a long-time sushi chef.
He says some, like monk fish, are always cooked to make them safe.
Park says, "Monk fish is a bottom dweller, so it does have worms sometimes. So, we don't serve monk fish raw."
Others, like salmon, are frozen before they are prepared, to kill off potential parasites.
Park says if mercury is a concern, try salmon, shellfish, and squid.
They have low levels.
Overall, if you have any worries, ask the chef for recommendations.
Meredith Baum, a registered dietitian, says,"If you're truly concerned, they're gonna let you know how everything was taken care of."
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