How to shoot one gold fish in game properly?

[cliffgoing]

Hello all,

Thanks for taking up your time to read my post. Please forgive me if my English is not so good, but hope that u can understand them.

I am playing Fishing Mania game on my android phone and after killing normal fish in one room, I can get corresponding coins as rewards, but I met such issue that I don't know how to shoot gold fish in game and it seems that it is rather hard for normal level of cannon to kill gold fish, so I am thinking of some way to shoot gold fish.

Here is the picture that I shoot normal fish in game.

Can anyone here give me some suggestions about how to shoot gold fish?

Many thanks.
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