Tuna is a fish. I know it’s accurate to say tuna sandwich but when you grow up saying tuna-fish sandwich, that’s a hard habit to shake.
Some folks say tuna salad sandwich. Back in my youth when pharmacies all feature lunch counters with bar stools, I ordered a tuna salad sandwich at Wooldridge Drugs in Vine Grove.
It came with a piece of lettuce under the bread. That’s not how Mom made a tuna-fish sandwich, so my preteen brain equated tuna salad with the piece of lettuce. After all, the main element of a salad is lettuce. Get it?