Maybe a reef shark- in shallow water, or most likely a nurse shark— NOT interested in the swimmer whatsoever, no matter who is “interpreting” the intentions. Stirring up mud— bottom feeding.
A bit of info- for most Atlantic coast beaches (this is the Gulf)— there are always— always sharks of different types, out just beyond the start of the breakers. Surfers know this— they see them all the time. Why? Because that is where the bait fish are schooling and moving, and also being chased by other smaller predator fish the sharks like to feed on. Another point- sharks can only feed so much— but still will brush against surfers legs (down the lateral sensor line on the shark) and maybe nibble. Rarely do sharks come into the breakers because of the confusion of noise the water (and people) make. But— smaller sharks will and they can bite (sand sharks particularly).
If one want’s shark free water— don’t go in the ocean, and if in Australia- always swim inside the shark netted areas.
BTW she did not swim “directly over”. The dude filming it— irresponsible in any case. It clearly wasn’t the man- eater types— white, tiger, — the more aggressive known species.
Know the critters, and learn how to respond- short of carrying a bang stick.
I wouldn’t dip a big toe into the ocean in Australia.
Nope, I can pretty much guarantee that was Bull shark, they are deadly...
She is lucky it left her alone.