[aaron695]

I wouldn't rule out it being due to Covid-19

Covid-19 is causing a lot of sharks deaths in Australia

https://taronga.org.au/conservation-and-science/australian-s...

[pvaldes]

I seriously doubt that sharks could pick covid-19

Is not difficult to figure out a logical and much simpler explanation for the orcas attack.

[karmakaze]

I can think of a 'logical' explanation that the orcas identified sailing vessels as detrimental to their habitat and food sources but have a hard time justifying or believing it.