Yeah they do that

Kangaroos do exactly this to dogs fairly regularly.

It's not necessarily an attempt to drown an attacker.

Roos often retreat into water as a defence. Even on land their defence is pretty much holding with their arms and kicking / disembowelling with their huge clawed feet. In the water that translates to holding something under the water.

Big male kangaroos are no joke. Just like males of any herd animal, they will do whatever they can to harm you of they're threatened.

He should argue his grievances to some sort of tribunal presided over by one or several judges in which legal issues and claims are heard and determined: one specifically that specializes in mammalians of the marsupial sort.

as he told Ms Lees that just 12 months ago he had fended off another attack, that time by a great white shark.

"I feel like they're trying to kill me, all these animals," he reportedly said.

Bloody hell, I wouldn't be going outside for a while

Dunkaroos

This would be an excellent test for the pollies I'd reckon