Dead fish.
I have a phobia of dead things.
Quite a silly phobia, isn't it?
snakehead and wolf fish
Not a fish, but I am even more scared of mantis shrimp, I had a near miss with one while I was trying to clean its tank too. They are extremely fast and when they hit you with their spike/smasher things it has the same force as a .22 cal...
Still doesn't put me off wanting to keep mantis shrimp, if only i had the space/time/money..
I'm not scared of any fish because of their looks though...
I'm scared of lion fish, whenever i have to clean their tank they swim up to my hands as they think they are being fed, but I don't fancy getting jabbed by the dorsal spines and having to go to hospital .