A visualization that helped me get over the fish thing many moons ago, it seems brutal, but it's the truth and it helps:
Think of seeing a delicious vegan meal in front of you, and then you go to take a bite. Suddenly a hook tears through your cheek and blood runs down your face, and as much as you struggle, you can't break free. You are pulled with all of your bodyweight on the hook towards unfamiliar territory, and are grabbed by a being much larger than you. They hold you tightly, and raise a large club and hit you once, and the more you twitch, the more they crack you over the head until you see nothing but darkness.