> Yes, and that explains why she sank - but it doesn’t explain why there were no survivors.
Sharks? USS Indianapolis CA-35 had pretty bad luck with sharks, why not the HMAS Sydney?
Yes, something along those lines could be part of the explanation.
If most of the Sydney’s lifeboats were destroyed - and that’s by no means impossible - and survivors were forced into the water in life belts and Carley floats and similar, sharks could have wreaked havoc.
We may never know what happened - but we’d like to.