That doesn't constitute a phobia.
Well if you read the question...it asks nothing about a phobia. Just if your afraid of any reptiles? As I said, for me I would be scared to be next to an adult croc weather it were coming after me or not. I guess it's like someone said about "fear of the unknown". Something that big and powerful that can kill you in an instant...is scary. Most likely my fear would subside if I were to learn more about them and have more encounters with them. This is not a phobia, cause if I had the opportunity (in somewhat of a controlled setting) to get close to one..I definately would...but be scared as hell the whole time.