Man advised to call authorities after GoPro makes disturbing discovery when dropped into ocean

When it comes to amazing GoPro footage today in 2025, we're not really short on options, yet each video posted online continues to be as shocking as the last.

It's simple, all you need is a waterproof case, the GoPro itself, a pole or line, and a body of water that you want to see into.

Sounds easy enough.

But sometimes, you end up seeing things that you wouldn't expect to see.

On the other hand though, there are people in the world who think it's a good idea to strap GoPros to some of the world's most brutal predators. To each their own, and all that.

But one man, who like many others decided to use his camera to explore the ocean by dropping their camera off a jetty in Port Noarlunga in Australia, came across something he least expected.

He was curious to see what was beneath the surface (YouTube/Dusty Sands)

YouTuber Dusty Sands decided to explore what was below the seawater in a video titled 'Dropping My Gopro Into Deep Water WHAT..IS..THAT..?'

He asked in the description: "SOMEONE TELL ME WHAT THIS IS?"

Essentially, the support stands of the jetty had formed its own environment, and he was curious to see what was really down there.

Straight away, below the surface, the water appeared green-ish and murky, before the camera caught the sight of something daunting.

In the frame, a large, round object was seen alongside one of the stands, with the round object featuring a number of spikes and a chain leading down beneath it, deeper into the water.

He wrote in the description: "Dropping my Gopro off the side of a jetty in Port Noarlunga. We looked back at the footage and kinda got freaked out when we saw it. We tried dropping the GoPro in at the same spot a few more times but never showed up again.."

Finding Nemo fans will be familiar with the sight, as it looks just like a sea mine.

In fact, people in the comments were so worried about the possibility of this, that they urged him to contact authorities over the discovery.

Some suggested that it was a sea mine (YouTube/Dusty Sands)

One user commented: "Strongly suggest reporting it to the coast guard btw, that Is a live naval mine that could take out that entire dock if triggered from a hit."

"Bro out here making the sea seem 3x scarier than it already is. I sure hope that isn't an actual live mine, or if it is, that coast guards take care of it," another pointed out.

A third wrote: "The pressure pins are NO JOKE, that would've destroyed whatever the building was decades ago. Should've called the coast guard."

Given that they couldn't find the object again and no news has been reported of an explosion at the jetty, we're safe (so far).