This could have new bait associated with it, or maybe be better off as a rework to grubs, minnows, and gummy worms, which for me, I think could have some stronger differences.
Minnows/grubs (one or the other) : when using this bait it cuts out the shadow tapping step (save the first)- so when you tap the blue dot immediately another one appears. (Perhaps room for another game? Blue dot can appear anywhere in the gray zone?) to stop fishing you can press a button to quit the mini game without losing your streak. This could also be how you start fishing rather than clicking the first shadow. Or maybe each shadow you click could have a set number of blue dots it will create in a row, like 3 for minnows, 5 for grubs.
Gummy worms/mealworms: clicking on the blue button does not stop fishing, and each time you click it you get another fish! As an extra- take it or leave it. Perhaps when the Normal timer would ‘ expire’ it instead turns gold for half a second and you can click it one final time for a last fish with increased rarity odds based on how many times you were able to click the blue dot. (Really minor effect, don’t want it to become much easier at all for rare items, but think it would make fishing more engaging for me)
The baits listed above are just suggestions, and these ideas are modular. It could be the second fishing mini game idea has a weaker bait that doesn’t have a golden phase, but a stronger version does- similar to how grubs and gummy worms are now.
