Rod Rell and Fist was definitely a huge influence. In fact, this is basically an adaptation of RR&F into a mini game for a Tiny Taverns campaign I was running.
And you're absolutely right. You can't hook a minnow! I'm shocked I didn't notice that before. I know the outcome of a 2d6 roll! Oh well, well call it a bonus fish that the GM can use however they like.