Parp.

My mates cousin has been on holiday in Australia for a week and a half, when him, his missus, and their 15 year old son decided to go scuba diving. The guy is in the navy and has had some scuba experience.

His son wanted a pic of his mum and dad in all their gear, so he got the underwater camera on the go. When it came to taking the pic, the dad realized the son looked like he was panicking, so he gave the 'ok' hand signal, to see if he was alright.

The son swam back to the surface and towards the boat as quick as he could, and mum and dad followed, concerned, to check he was ok. They caught up to him as he was scrambling onboard the boat absolutely shitting himself.

The parents of course asked what had happened, and the boy told them 'There was a shark behind you!', and the skipper of the diving boat confirmed this fact, stressing that they wouldn't believe it if he told them exactly what it was. As soon as they were safely back at the hotel, they uploaded the image onto their laptop. This is what they saw...... (click image)

(By the way, this is all ripped off, straight from an email circular that apparently did the rounds a few years ago. But, it's good to share.)