Was he/she gnashing its teeth ...opening mouth and closing it often?
I suppose it being beneath you, it would be hard to tell the signs besides using you as Seal training, only that it knew you weren't a Seal and that kinda annoyed it.
Juvenile Whites really get confident and go for a real attack when other Whites are around. Pack mentality I guess.
I reckon I would have crapped myself seeing any decent size bitey shark using me for target practice.
I have a few mates who often Spearfish around the Kiama & Jervis Bay area where its mostly Bronzies that buzz them for the fish.
One mate had a Tiger Shark come up from the depths because with his head down taking photos amongst rocks and a big yellow Rebreather - he was looking everything like a Turtle.
Tiger Sharks don't go for prey that move around a lot though. They scavenge mostly except for easy prey.
I nearly became the first ScubaDiver bitten by a Grey Nurse at BushRangers-Bass Point.
"Ex Nurse bitten by Grey Nurse!!"
I was a bit peeved it didn't happen - reckon it was my only chance for 'fame'.