It'll probably scare the hell out of the fish.
BUT!
Around the campfire after you call it a day on the lake, you can play it to your heart's content without ever needing to replace a battery.
Also a great workout for the lungs.
Mine came wth a nice zippered nylon carrying bag and a short mouthpiece and a second mouthpiece attached to a hose for either playing position.
It's also a nice item to take to the park or on road trips or flights since it's compact, works anywhere and it won't make you cry if TSA destroys it or you lose it on the road.
Basically it's a harmonica for keyboard players. And have you priced a decent Hohner Harmonica these days? This thing sells for about half the price of a basic harmonica and it can play in any key, not just the one it's been tuned to.
Believe me, you'll be the hit of the Thraaxorian Ball with one of these suckers in your kit
Gary