What Kind Of Fruit are Bananas?!?!?! Lethbridge, AB, Canada / Todays Country 95-5 May 29, 2017 05:57 pm Fiona Henderson / CC Okay this is a serious truth bomb that may ruin your day. Bananas…. That fruit that is great for potassium is… A BERRY. Yeah. I know you’re thinking “Julia, you’re insane” You’re right. HERE are the details.