Deep sea fish like tuna can also carry worms, but “they generally have fewer parasites,” Hawdon says. When worms are in fish, you may see them — or you may not. “The worms in fish are ...

But you can buy a can of tuna fish at the grocery store for under $2. So, what's the difference? For starters, it's not the same fish. Canned tuna typically comes from albacore. They're small ...