I'm afraid of poisonous animals that can be fatal - including, but not limited to, jellyfish, scorpions, brown recluse spiders, and poisonous snakes. The phrase 'water moccasin' makes me shudder. Apart from that, I tend toward being a hypochondriac, so I fear diseases/maladies of every kind from heart attacks and brain cancer. It seems that week I manage to 'contract' some new illness.