How to Kill Big Fish in Ka Fish Hunter?

I've played ka fish hunter in sportzino a few times already, but I've only managed to kill small fish. guys, share your experience, how do you kill big fish here, maybe there are special weapons in the game?

 

Did you kill the fish that carried bonuses or the electric stingray? As for me, the electric stingray is one of the coolest features in ka fish hunter , it kills several fish nearby and even medium-sized fish, so you can get good bonuses. Or have you seen that sometimes there are fish that have a screen freeze bonus? To kill a big fish, I freeze the screen and kill an electric stingray, of course, when I'm really lucky