Rockfish have always terrified me. Not the kind that you eat, but the kind that has venomous spines.
I don't even think they are found in the area where I live, but I've read about them so much that I can't help but be afraid every time I go into the water. They apparently look just like a rock on the ground and most people don't even see them before they stand on them.
If you stand on one, the rockfish will stab it's spines into you without a moment's hesitation, and basically that will kill you, quickly and painfully. Most venomous animals aren't deadly, but the rockfish absolutely is, and since most people aren't really familiar with it, they probably won't even know what's wrong with you if you get stabbed.
It just terrifies me. Any kind of rockfish information makes me not want to go to the water.