thats because of the devlolopers huge mistake that they Just made the game to punish you when you try to make progress lets make a calculation fırst fish gives 50 gold requesting 1 blood 2. tier fishes gives 75 gold requesting 1 blood 1 small fish so in the small fish 1 blood=50gold but bigger fish 1 blood=25(75-50=25)gold and that makes literally no sense bro