Canned tuna is already cooked — use it raw.

Yes. Canned tuna is fully cooked during the canning process, so you can absolutely use it in ceviche or tartare without further cooking.

The confusion makes sense — we think of ceviche as “raw fish” and tartare as “raw meat.” But canned tuna is pressure-cooked inside the can. It’s shelf-stable for a reason. So all you’re doing is mixing it with lime juice, onions, herbs, or whatever you’d normally use. The acid from the ceviche won’t “cook” it further (that’s a myth for already-cooked fish), but it will marinate and flavor it.

Two things to watch: texture and quality. Canned tuna is often mushy, which isn’t ideal for tartare. If you want clean, firm chunks, buy higher-end tuna packed in oil (not water) or consider jarred ventresca. For a more rustic ceviche, standard chunk light works fine — just drain it well.

Bottom line: You’re not reinventing food safety. Canned tuna is already a cooked ingredient. Use it like you would shredded chicken.