A second great white shark encounter in the space of two weeks in Bass Strait left another father and son lucky to be alive after their boat was rammed off Tasmania's North coast.
Launceston fishermen Sean and James Vinar were in their 5.5-metre boat photographing and filming seals at Tenth Island on Wednesday when they were suddenly interrupted by the great white shark.
Watch the footage below (Warning: explicit language):
Sean Vinar said there was a sudden loud bang on the side of the boat.
"We turned around and thought we'd just slow the boat down and have a good look at the island," he said.
"Next minute, there was just an almighty thump on side of the boat, this shark just flew out of the water and latched onto the side of the boat.
The location of Tenth Island, also known as Barrenjoey:
"I started to move the boat forward to get shark off the anchor, the entire mouth had engulfed the anchor, it was something you see on the TV, like a wildlife documentary.
"It was that big, I was concerned that if it started to thrash its tail it'd put a hole in the boat. We weren't sure if it bit into the side of the boat."
Fortunately, their boat sustained no significant damage and they were able to flee the area.
The pair's attention has now turned to why the terrifying incident occurred - particularly in light of the recent attack off Stanley on the state's North-West Coast, in which 10-year-old Lucas Arnott was dragged into the water by a great white shark on July 17.
Sean and James Vinar were yet to start fishing and were simply moving slowly in calm water.
Sean Vinar said seals started swimming towards the boat from the island just before the attack occurred.
"Whether that's what enticed the shark - it might've been following the seals swimming towards the boat - we don't really know," he said.
"It could've seen us as another predator - a bigger shark going after the seals, and wanted to take us, so it hit the side of the boat.
"I thought great whites would only be in a warmer temperature areas, I was just amazed, it was totally unexpected."
A spokesperson for the CSIRO confirmed it was not uncommon or unusual for great white sharks to be spotted in Tasmanian waters, particularly in feeding grounds.