Go Fishing!

Go Fishing! is a pretty game, with a top-down view of colorful fish swimming around a tropical undersea environment.
You want to catch the fish by firing a net at them, and you only have two controls:
You can tap on where you want the net to go, and you can tap on your net cannon to determine your net's size rating, from 1 to 7.
You're very likely to catch small fish with a medium-size or large net, but sometimes even a medium-size fish will shrug off your largest net.
You have to watch for the patterns of swimming sea creatures to determine how best to deploy your nets and because catching fish earns you money while shooting nets costs you money, you have to carefully manage your stash of coins.