canned tuna; tinned tuna
Originally a brand name (Sea Chicken) that became a generic term for canned tuna in Japanese. Used in everyday contexts.
from English Sea Chicken
サラダにシーチキンを入れるとおいしい。
It's delicious when you add canned tuna to a salad.
スーパーでシーチキンを買ってきた。
I bought some canned tuna at the supermarket.