Hello!
your answer is: A Phobia
The specific phobia referring to snakes is called Ophidiophobia
A phobia is the scientific term for an abnormal fear of something. usually it involves an animal or dangerous object.
for example, the fear of spiders is arachnophobia
another example is the fear of sharp objects, called Aichmophobia. this is most commonly seen when someone is afraid of medical needles and panics at the thought of a medical shot
I hope this helps, and have a nice day!