Brodie Moss' YouTube account YBS Youngbloods has footage of Moss balancing on his paddleboard while a tiger shark stalks a marine turtle.
Moss may be heard stating, "Big showdown." "I'm right in the middle of things."
"Oh no!" exclaims the speaker. "Moss can be heard saying," says the narrator.
The sea turtle appears to quickly avoid the shark, but it soon turns and heads right for the paddleboard, with the shark close after.
The camera appears to plummet to the bottom of the seafloor in a tense moment, and all that can be seen is sand.