UPDATE: It looks like our cynicism was well founded about this shark photo. Here's some compelling evidence the photo is fake.
Australians love their shark hoaxes. So when a story came out of Bondi Beach of a massive shark shadowing a group of swimmers, we approached with caution.
The photo, snapped by Bondi Fit Training coach John 'Spot' Anderson, shows a group of swimmers diving down to the shark net, with a large shark on the inside of the net.
Check it out:
Anderson told The Huffington Post Australia the photo was legitimate.
"People can believe what they want," Anderson said.
"I told the rookies it was all fake because we had a surf clinic last Saturday and I didn't want them freaking out.
"It's weird though, we got more people than ever."
He said none of the swimmers saw the shark -- himself included.
"We swum out to the nets to take a few photos," Anderson said.
"I dove down about 15 metres and they didn't come down until I was almost out of breath.
"I was coming up towards the light when I took this pic."
It's a great story, but not everyone's convinced.
@SMH re:Fake Shark Photobomb. Sharks swim straight not on angle. Water visibility shark not consistent with swimmers. Clever PR for Bondifit— Giulio Campobassi (@giuliocc) September 22, 2015
Critics of the photo say the shark is swimming at a strange angle when you straighten the image.
Another criticism is a comparison between the far off swimmers and the presumably closer sharks.
Anderson said that was probably to do with the GoPro's wide lens.
"It's got a bit of a fish eye effect so the shark could be anywhere from 10 to 15 metres away," he said.
Also, his Facebook friends seem to be having a lot of fun with it.
Regardless of this, Anderson is adamant the photo is real, and it's not the first time he's had an unreal oceanic experience.
Here's a video of his stand-up paddle boarding with dolphins.