Re: "Real" Apex predator undiscovered
Just to squash this.
A 9 foot Great White is large, but it is tiny compared to a fully grown Great White. The day of the incident monitored on the attack, they discovered that several massive Great Whites (15+ feet) were just arriving in Australia after a migration. The type of attack involved, the warmth of the belly of a Great White and the fact we know Great Whites aren't strangers to attacking their own species confirmed that a massive Great White was the most likely culprit behind the attack of this smaller Great White.
Furthermore, Great Whites have always had a higher predator. Large Orcas hunt Great Whites alone without a pack while smaller Orcas attack Great Whites in packs. Of course, Orcas wouldn't be stupid to be risky around a Great White, but I wouldn't exactly say Great Whites are the deadliest creature in the sea, but I would still say it's the ultimate predator of the sea.