I don't think fears are phobias though? If someone said there's a poisonous snake behind you, then it's not a phobia to move away.

Like many psychological things the line is more "when your response is damaging to yourself and others".

I knew someone with a phobia of stickers on fruit. Just tried to Google what that is called and found this comment from a sufferer:

"I can't have them on my skin and if anyone put one on me without prior warning I would panic and scream. I HATE HATE HATE ones on fruit"