I love the idea, but sadly i wasnt able to complete it:( everytime i had more than one fish it bugged and didnt give me any:( (im propably just stupid xD) but i see some great potential here!
the net rules are pretty finicky! if you make one continuous loop (not multiple little ones) and make sure to not have any corners (no more than 2 stones touching any 1 stone, including diagonals), then the net should form properly. Thank you for giving it a shot ^^