Tunafish - isn't that a bit redundant?

So, I'm driving home tonight when I realized that I forgot to rant about something today. Since I just got home, I figured I'd rant really quick while I was thinking about it.

I was minding my own business at the office (i.e. surfing the internet), when a woman that I work with stood up and randomly said, "I smell tunafish". Then she sniffed...stared around a bit...and eventually sat down. Although her random declaration of what she smells is mildly strange (as is she), that's not what I want to rant about.

I have a problem with the term, "tunafish".

To me, that sounds redundant. "Tuna" should be more than sufficient when talking about tuna. I know it's a fish. So do most other people in the world. Instead of saying, "I'm eating a tunafish sandwich...just say, "I'm eating a tuna sandwich". I PROMISE, I'll know exactly what you're referring to.

You don't hear people saying "I'm eating a ham pig sandwich". Just like you don't hear people saying "I'm eating a venison deer steak" or a "roast beef cow sandwich". Hell, you don't even hear people saying "I'm cooking salmon fish for dinner". Do you know why? BECAUSE THERE'S NO REASON TO!

Please, people...stop being annoying. I beg you. (One of these days, I'll list my pet peeves so you can know what behaviors to avoid when spending any time around me.)