Why do people say Tuna Fish?

People dont....

Americans do.

Its because that is the correct way to say tuna fish. And Salmon is the correct way to say Salmon.

it's because they're thinking or the wrong fish. see people used to pronounce the words herron and herring the same way and so some people started to say herron fish (to deferinciate from herring bird). then that died down, and someone heard about a fish that used to have the word fish after its name, but couldn't remeber which fish. so they just took a stab in the dark at tuna, and for some reason it stuck.

reason canned tuna used to have a fantasy approximately being dolphin and whale. So, we call it tuna fish so human beings understand have been speaking approximately healthful fish and not tuna created from dolphins and seals and different scrumptious yummy little sea critters.

bcoz tuna is a fish =0

I dont we just say get the tin of tuna out of the fridge not into salmon to rich for my slice of toast??im irish

Who says people don't say salmon fish?

I dont. I just say tuna

its because you can tune a piano but can't tuna fish.

good question...

never thought it before...may be tuna sounds odd..

Because when they eat it, they have to remind themselves it is actually fish they are eating and not balsa wood.