An orca?
A greater great white? They can grow to more than 6 meters.
Pibbur who doesn't think it's godzilla.
and doesn't fit any common taxonomy.
You're video shows something that was identified as a sleeper shark.
https://www.youtube.com/watch?v=lv7DRwPbVJM
It's pretty creepy that youtube suggested a megalodon video based on me searching for megalodon, but anyway here it is. Looks like they have filmed one on tape. Anyway they filmed SOMETHING, and it's ginormous and doesn't fit any common taxonomy.
I think it's likely they are still around. The oarfish is a good explanation why - basically things that rarely surface beyond 100-200 feet will hardly ever be sighted. Oarfish was once thought very rare but is now thought to be common, and they can also be quite huge.
There's no such thing as 40-50 foot sleeper shark, they get to be 14 feet. That cage is about 6 foot across. It may be something similar to one but larger, but it does NOT fit that classification
Lots of people in video make claims it is whale shark or 50 various things but there's no consensus or input from experts. Regardless, something that size means other things that size are around. They've discovered dozens of sharks thought to be extict, aren't, just in the last few years.
That's not a clip from that awful Discovery program, is it? You know, the one they did that was just as based in reality as the mermaids one.
I'd rather it be Godzilla but they are pretty sure it was just a larger shark.
Still, its the deadly land known as Australia. I'm surprised any people survive to adulthood there.
Why no microbes? Too small!! We are only interested in large killing things!