I was wondering if anyone who grew up or visits to Virginia Beach a lot could help me identify something I saw and almost had an encounter with. My friend and I were vacationing there one summer and when we were swimming a huge wave hit us pulling us under and luckily closer to shore. When I got up I pulled the hair away from my face and looked for my friend, she was doing the same and I saw a large dark gray fin behind her. She was only a few feet behind me and I yelled her to get out, she wouldn't and I told her to turn around, and of course she ran. I know fish swim from side to side and dolphins swim up and down, I wasn't looking long enough to know for SURE but I'm almost positive it was from side to side. The fin seemed to be a lot bigger than a dolphin fin but then I've never seen a dolphin. It was also by itself where I'm assuming dolphins swim together. How can I tell if what I saw was a shark or a dolphin? What sharks even live in Virginia Beach?