'A bit of fun': Chalmers claims national butterfly title

Freestyler Kyle Chalmers entered a butterfly race for the first time at the Australian swimming championships as "a bit of fun".

Now, he's a national champion in the stroke after winning the 100m title in Adelaide on Sunday night.

"I stuck my head down and tried to swim similar to how I swim freestyle races – come home strong," he said.

"It's a bit more challenging doing butterfly though."