This was a very typical moment while diving in Antigua this kind of sized Barracuda would come in close sometimes with a friend. Am glad I managed to get some video up about it, can't wait to try out my go pro as you can see this is not taken with anything near as sophisticated for todays market.
Here is a cool post on what might be happening when a barracuda follows you- https://xcalakmexico.com/snorkeling-barracuda/