Ah controls were fine, ironic that I was vague there myself. :D
Anyway, I meant it was a bit too vague how the fish behaved since they're off-screen, and there was a lot of variance between what I did and what the fish did in response (e.g. after a few seconds of my first usage of the siren, I used the small call, and small fish kept going away, and when i used it again, the monster came back and not the small fish. So I guess was also vague what strategy I should use.